1. Nung x mol Fe trong khng kh mt thi gian thu c 16,08 gam hn hp H gm 4 cht rn, l Fe v 3 oxit ca n. Ha tan ht lng hn hp H trn bng dung dch HNO3 long, thu c 672 ml kh NO duy nht (ktc). Tr s ca x l: a) 0,15 b) 0,21 c) 0,24 d) Khng th xc nh c v khng d kin 2. Cho rt chm tng git dung dch HCl vo dung dch Na2CO3. Ta nhn thy: a. C hin tng si bt kh CO2 ngay, cho n khi ht Na2CO3. V HCl l mt axit mnh n y c CO2 ra khi mui cacbonat l mui ca axit rt yu H2CO3. b. Khng c xut hin bt kh v cho t t dung dch HCl nn ch to mui axit NaHCO3. c. Lc u cha thy xut hin bt kh, sau mt lc, khi dng nhiu HCl, mi thy bt kh thot ra. d. Tt c u khng ng v cn ph thuc vo yu t c un nng dung dch th nghim hay khng, v nu khng un nng dung dch th s khng thy xut hin bt kh. 3. Ha tan hon ton a gam FexOy bng dung dch H2SO4 m c nng va , c cha 0,075 mol H2SO4, thu c b gam mt mui v c 168 ml kh SO2 (ktc) duy nht thot ra. Tr s ca b l: a) 9,0 gam b) 8,0 gam c) 6,0 gam d) 12 gam 4. Tr s ca a gam FexOy cu (3) trn l: a) 1,08 gam b) 2,4 gam c) 4,64 gam d) 3,48 gam 5. Cng thc ca FexOy cu (3) l: a) FeO c) Fe2O3 c) Fe3O4 d) Thiu d kin nn khng xc nh c 6. Cho rt t t dung dch Na2CO3 vo dung dch HCl. Chn pht biu ng nht: a. Thy c bt kh thot ra. b. Khng c bt kh thot ra lc u, v lc u c to mui axit NaHCO3, mt lc sau mi c bt kh CO2 thot ra do HCl phn ng tip vi NaHCO3. c. Do cho rt t nn CO2 to ra thi gian phn ng tip vi Na2CO3 trong H2O to mui axit, nn lc u cha to kh thot ra. d. (b) v (c) 7. Cho t t dung dch NH3 vo dung dch Al2(SO4)3. a. Lc u thy dung dch c, sau khi cho tip dung dch NH 3 lng d vo th thy dung dch trong, do Al(OH)3 lng tnh, b ha tan trong dung dch NH3 d.

b. Lc u thy dung dch c l do c to Al(OH)3 khng tan, sau khi cho dung dch NH3 c d, th thy dung dch trong sut, l do c s to phc cht tan c trong dung dch. c. NH3 l mt baz rt yu, n khng tc dng c vi dung dch Al2(SO4)3. d. Tt c u sai. 8. Nh t t dung dch Xt vo dung dch Zn(NO3)2, ta nhn thy: a) Thy xut hin kt ta ri tan ngay. b) Lc u dung dch c, khi cho dung dch Xt d vo th thy dung dch tr li trong sut. c) Lc u dung dch c l do c to Zn(OH)2 khng tan, sau vi kim d, n to phc cht [Zn(NH3)4]2+ tan, nn dung dch tr li trong. d) (a) v (c) 9. 2,7 gam mt ming nhm ngoi khng kh mt thi gian, thy khi lng tng thm 1,44 gam. Phn trm ming nhm b oxi ha bi oxi ca khng kh l: a) 60% b) 40% c) 50% d) 80% 10. Cho kh CO2 vo mt bnh kn cha Al(OH)3. a) C phn ng xy ra v to mui Al2(CO3)3. b) C to Al2(CO3)3 lc u, sau vi CO2 c d s thu c Al(HCO3)3. c) Khng c phn ng xy ra. d) Lc u to Al2(CO3)3, nhng khng bn, n t phn hy to Al(OH)3 v CO2. 11. X l mt kim loi. Ha tan ht 3,24 gam X trong 100 ml dung dch NaOH 1,5M, thu c 4,032 lt H2 (ktc) v dung dch D. X l: a) Zn b) Al c) Cr d) K 12. Nu thm 100ml dung dch HCl 2,1M vo dung dch D cu (11), thu c m gam cht khng tan. Tr s ca m l: a) 9,36 gam b) 6,24 gam c) 7,02 gam d) 7,8 gam 13. vi, vi sng, vi ti c cng thc ln lt l: a) CaCO3, CaO, Ca(OH)2 b) CaCO3, Ca(OH)2, CaO c) CaO, Ca(OH)2, CaCO3 d) CaO, CaCO3, Ca(OH)2 14. Tch Ag ra khi hn hp Fe, Cu, Ag th dng dung dch no sau y? a) HCl b) NH3 c) Fe(NO3)3 d) HNO3 m c 15. Ha tan hon ton 2,52 gam kim loi M trong dung dch H2SO4 long to thnh 6,84 gam mui sunfat. M l kim loi no? a) Al b) Zn c) Mg d) Fe

16. Kh hon ton mt oxit st nguyn cht bng CO d nhit cao. Kt thc phn ng, khi lng cht rn gim i 27,58%. Oxit st dng l: a) Fe2O3 b) Fe3O4 c) FeO d) C 3 trng hp (a), (b), (c) u tha bi 17. Chn cu tr li ng. Tnh oxi ha ca cc ion c xp theo th t gim dn nh sau: a) Fe3+ > Cu2+ > Fe2+ > Al3+ > Mg2+ b) Mg2+ > Al3+ > Fe2+ > Fe3+ > Cu2+ c) Al3+ > Mg2+ > Fe3+ > Fe2+ > Cu2+ d) Fe3+ > Fe 2+ > Cu 2+ > Al3+ > Mg2+ 18. Hn hp kim loi no sau y tt c u tham gia phn ng trc tip vi mui st (III) trong dung dch? a) Na, Al, Zn b) Fe, Mg, Cu c) Ba, Mg, Ni d) K, Ca, Al 19. Ha tan hn hp hai kh: CO2 v NO2 vo dung dch KOH d, thu c hn hp cc mui no? a) KHCO3, KNO3 b) K2CO3, KNO3, KNO2 c) KHCO3, KNO3, KNO2 d) K2CO3, KNO3 20. Cho hn hp gm Ba, Al2O3 v Mg vo dung dch NaOH d, c bao nhiu phn ng dng phn t c th xy ra? a) 1 b) 2 c) 3 d) 4 21. Trng hp no sau y khng xy ra phn ng? a) Dung dch (NH4)2CO3 + dung dch Ca(OH)2 b) Cu + dung dch (NaNO3 + HCl) c) NH3 + Cl2 d) Dung dch NaCl + I2 22. Cho 0,25 mol CO2 tc dng vi dung dch cha 0,2 mol Ca(OH)2. Khi lng kt ta thu c l: a) 10 gam b) 20 gam c) 15 gam d) 5 gam 23. Ion no sau y va c tnh kh va c tnh oxi ha? a) Clb) Fe 2+ c) Cu 2+ d) S 224. Cho dung dch NaOH lng d vo 100 ml dung dch FeCl2 c nng C (mol/l), thu c mt kt ta. em nung kt ta ny trong chn khng cho n khi lng khng i, thu c mt cht rn, em ha tan ht lng cht rn ny bng dung dch HNO3 long, c 112cm3 kh NO (duy nht) thot ra (ktc). Cc phn ng xy ra hon ton. Tr s ca C l: a) 0,10 b) 0,15 c) 0,20 d) 0,05 25. Cho mt lng mui FeS2 tc dng vi lng d dung dch H2SO4 long, sau khi kt thc phn ng, thy cn li mt cht rn. Cht rn ny l: a) FeS2 cha phn ng ht b) FeS c) Fe2(SO4)3 d) S 26. Cho mt inh st lung d vo 20 ml dung dch mui nitrat kim loi X c nng 0,1M. Sau khi phn ng xy ra hon ton, tt c kim loi X to ra

bm ht vo inh st cn d, thu c dung dch D. Khi lng dung dch D gim 0,16 gam so vi dung dch nitrat X lc u. Kim loi X l: a) ng (Cu) b) Thy ngn (Hg) c) Niken (Ni) d) Mt kim loi khc (Cu = 64; Hg = 200; Ni = 59) 27. Cho bit Thy ngn c t khi bng 13,6. Pht biu no sau y khng ng cho thy ngn (Hg)? a) Hai th tch bng nhau gia hi thy ngn v khng kh th hi thy ngn nng hn khng kh 13,6 ln. b) Khi lng ring ca thy ngn l 13,6 kg/lt. c) Thy ngn nng hn nc 13,6 ln. d) Thy ngn l mt cht lng rt nng. 28. Cho hn hp hai kim loi Bari v Nhm vo lng nc d. Sau th nghim, khng cn cht rn. Nh vy: a) Ba v Al b ha tan ht trong lng nc c d. b) S mol Al nh hn hai ln s mol Ba. c) S mol Ba bng s mol Al. d) S mol Ba nh hn hoc bng hai ln s mol Al 29. Hn hp A gm hai kim loi kim hai chu k lin tip nhau. Ha tan 0,37 gam hn hp A trong nc d, thu c dung dch X. Cho 100 ml dung dch HCl 0,4M vo dung dch X, c dung dch Y. trung ha va lng axit cn d trong dung dch Y, cn thm tip dung dch NaOH c cha 0,01 mol NaOH. Hai kim loi kim trn l: a) Li-Na b) Na-K c) K-Rb d) Rb-Cs (Li = 7; Na = 23; K = 39; Rb = 85; Cs = 133) 30. Ha tan ht 3,53 gam hn hp A gm ba kim loi Mg, Al v Fe trong dung dch HCl, c 2,352 lt kh hiro thot ra (ktc) v thu c dung dch D. C cn dung dch D, thu c m gam hn hp mui khan. Tr s ca m l: a) 12,405 gam b) 10,985 gam c) 11,195 gam d) 7,2575 gam (Mg = 24; Al = 27; Fe = 56; Cl = 35,5) 31. Cn ly bao nhiu gam dung dch H2SO4 m c c sn (c nng 97,5%) v khi lng nc pha c 2 lt dung dch H 2SO4 37,36% (c t khi 1,28) (l dung dch axit cn cho vo bnh acqui)? a) 980,9 gam; 1 579,1 gam b) 598,7 gam; 1 961,3 gam c) 1120,4 gam; 1 439,6 gam d) Tt c u khng ph hp 32. Dung dch H2SO4 cho vo bnh acqui trn (dung dch H2SO4 37,36%, t khi 1,28) c nng mol/l l: a) 2,98M b) 4,88M c) 3,27M d) 6,20M 33. Cc cht no c th cng tn ti trong mt dung dch? a) (NH4)2CO3; K2SO4; Cu(CH3COO)2

b) Zn(NO3)2; Pb(CH3COO)2; NaCl c) HCOONa; Mg(NO3)2; HCl d) Al2(SO4)3; MgCl2; Cu(NO3)2 34. Ha tan hon ton 1,84 gam hn hp hai kim loi Mg v Fe bng dung dch HCl. Chn pht biu ng. a) Th tch kh H2 thu c ln hn 736 ml (ktc) b) Th tch kh H2 nh hn 1 717 ml (ktc) c) S mol kh hiro thu c nm trong khong 0,033 mol n 0,077 mol d) Tt c u ng 35. Dung dch Ca(OH)2 0,1M trung ha va dung dch HNO3 0,05M. Nng mol/l ca dung dch mui sau phn ng trung ha l (Coi th tch dung dch khng i khi trn chung nhau): a) 0,02M b) 0,01M c) 0,03M d) Khng d kin tnh 36. Cho hn hp hai kh NO2 v CO2 vo lng d dung dch xt, thu c dung dch c ha tan cc cht: a) NaNO3; Na2CO3; NaOH; H2O b) NaHCO3; NaNO2; NaNO3; NaOH; H2O c) Na2CO3; NaNO3; NaNO2; NaOH; H2O d) Tt c u cha y cc cht 37. 44,08 gam mt oxit st FexOy c ha tan ht bng dung dch HNO3 long, thu c dung dch A. Cho dung dch NaOH d vo dung dch A, thu c kt ta. em nung lng kt ta ny nhit cao cho n khi lng khng i, thu c mt oxit kim loi. Dng H2 kh ht lng oxit ny th thu c 31,92 gam cht rn l mt kim loi. FexOy l: a) FeO b) Fe2O3 c) Fe3O4 d) S liu cho khng thch hp, c th Fe xOy c ln tp cht 38. Khng c dung dch cha: a) 0,2 mol K+; 0,2 mol NH4+; 0,1 mol SO32-; 0,1 mol PO43b) 0,1 mol Pb2+; 0,1 mol Al3+; 0,3 mol Cl-; 0,2 mol CH3COOc) 0,1 mol Fe3+; 0,1 mol Mg2+; 0,1 mol NO3-; 0,15 mol SO42d) Tt c u ng 39. Dung dch H2SO4 4,5M c khi lng ring 1,26 g/ml, c nng phn trm l: a) 35% b) 30% c) 25% d) 40% 40. Ha tan ht hn hp hai kim loi kim th vo nc, c 1,344 lt H 2 (ktc) thot ra v thu c dung dch X. Th tch dung dch HCl 1M cn trung ha va dung dch X l: a) 12 ml b) 120 ml c) 240 ml d) Tt c u sai

41. 61,6 gam vi sng (ch gm CaO) ngoi khng kh kh mt thi gian. Sau em ha tan vo lng nc d, dung dch thu c trung ha va 2 lt dung dch HCl 1M. Phn trm CaO b CO2 ca khng kh phn ng l: a) 5,57% b) 8,25% c) 9,09% d) 10,51% 42. Km photphua tc dng vi nc, thu c: a) Axit photphor (H3PO3) b) Axit photphoric (H3PO4) c) Photphin (PH3) d) Khng phn ng 43. S ion OH- c trong 2 lt dung dch Ba(OH)2 pH = 12 l: a) 2.1018 b) 2.10-2 c) 12,04.1019 d) 1,204.1022 44. Khi lng ring ca axetilen ktc l: a) 0,896 g/ml b) 1,16 g/ml c) 1,44 g/ml d) Tt c u sai 45. Vng cng nh bch kim ch b ha tan trong nc cng toan (vng thy), l dung dch gm mt th tch HNO3 m c v ba th tch HCl m c. 34,475 gam thi vng c ln tp cht tr c ha tan ht trong nc cng toan, thu c 3,136 lt kh NO duy nht (ktc). Phn trm khi lng vng c trong thi vng trn l: a) 90% b) 80% c) 70% d) 60% (Au = 197) 46. Nguyn t no c bn knh ion nh hn bn knh nguyn t tng ng? a) Clo b) Lu hunh c) Neon d) Natri 47. Phn ng nhit nhm l phn ng: a) Nhm b oxi ha to nhm oxit khi un nng trong khng kh. b) Ion nhm b kh to nhm kim loi catot bnh in phn khi in phn nhm oxit nng chy. c) Nhm y c kim loi yu hn n ra khi oxit kim loi nhit cao. d) Nhm y c cc kim loi yu hn n ra khi dung dch mui. 48. ng v l hin tng: a) Cc nguyn t ca cng mt nguyn t nhng c khi lng khc nhau. b) Cc nguyn t c cng s th t nguyn t Z (s hiu), nhng c s khi A khc nhau. c) Cc nguyn t c cng s proton, nhng khc s neutron (ntron) d) Tt c u ng. 49. Cho lung kh CO i qua m gam Fe 2O3 un nng, thu c 39,2 gam hn hp gm bn cht rn l st kim loi v ba oxit ca n, ng thi c hn hp kh thot ra. Cho hn hp kh ny hp th vo dung dch nc vi trong c d, th thu c 55 gam kt ta. Tr s ca m l: a) 48 gam b) 40 gam c) 64 gam d) Tt c u sai, v s khng xc nh c.

50. Cho lung kh H2 c d i qua ng s c cha 20 gam hn hp A gm 57. Khi cho 5,4 gam kim loi nhm phn ng hon ton vi dung dch H2SO4 MgO v CuO nung nng. Sau khi phn ng hon ton, em cn li, thy khi m c, nng to kh SO2 thot ra th lng kim loi nhm ny trao i lng cht rn gim 3,2 gam. Khi lng mi cht trong hn hp A l: bao nhiu in t? a) 2gam; 18gam b) 4gam; 16gam c) 6gam; 14gam; d) 8gam; 12gam a) cho 0,2 mol in t b) nhn 0,6 mol in t 51. Xem phn ng: c) cho 0,4 mol in t d) Tt c u sai 58. Thc hin phn ng nhit nhm hon ton m gam Fe2O3 vi 8,1 gam Al. to Zn + XO ZnO + X Ch c oxit kim loi b kh to kim loi. em ha tan hn hp cc cht thu c sau phn ng bng dung dch NaOH d th c 3,36 lt H 2(ktc) thot ra. X c th l: Tr s ca m l: a) Cu b) Sn c) C d) Pb a) 16 gam b) 24 gam c) 8 gam d) Tt c u sai 52. Qu trnh to in (chiu thun) v qu trnh sc in (chiu nghch) ca + 2+ 59. Xem phn ng: aCu + bNO3 + cH dCu + eNO + fH2O acqui ch l: Tng s cc h s (a + b + c + d + e + f) nguyn, nh nht, phn ng 2 PbSO4 + 2 H2O Pb + PbO 2 + 2 H2SO4 trn cn bng, l: (c th c cc h s ging nhau) a) 18 b) 20 c) 22 d) 24 Cht no b kh trong qu trnh to in? 60. Sc 2,688 lt SO2 (ktc) vo 1 lt dung dch KOH 0,2M. Phn ng hon a) Pb b) PbO2 c) H2SO4 d) SO42-/H+ 53. Phn ng xy ra trong pin Niken Caimi (Ni-Cd) trong qu trnh to in ton, coi th tch dung dch khng i. Nng mol/l cht tan trong dung dch thu c l: l: a) K2SO3 0,08M; KHSO3 0,04M b) K2SO3 1M; KHSO3 0,04M 2NiO(OH) + Cd + 2H2O 2Ni(OH)2 + Cd(OH)2 c) KOH 0,08M; KHSO3 0,12M d) Tt c u khng ng Cht no b oxi ha trong qu trnh sc in (l qu trnh nghch ca qu 61. Khi lng tinh th ng (II) sunfat ngm nc (CuSO 4.5H2O) cn ly trnh to in)? pha c 250 ml dung dch CuSO4 0,15M l: a) Ni(OH)2 b) Cd(OH)2 c) OH- d) C hai cht Ni(OH)2 v Cd(OH)2 a) 6,000 gam b) 9,375 gam c) 9,755 gam d) 8,775 gam 54. em nung 116 gam qung Xierit (cha FeCO3 v tp cht tr) trong (Cu = 64; S = 32; O = 16; H = 1) khng kh (coi nh ch gm oxi v nit) cho n khi lng khng i. Cho hn hp kh sau phn ng hp th vo bnh ng dung dch nc vi c ha 62. Cn thm bao nhiu gam CuSO4.5H2O vo 200 gam dung dch CuSO4 5% tan 0,4 mol Ca(OH)2, trong bnh c to 20 gam kt ta. Nu un nng phn thu c dung dch 10%? a) 17,35 gam b) 19, 63 gam c) 16,50 gam d) 18,52 gam dung dch, sau khi lc kt ta, th thy c xut hin thm kt ta na. Hm 63. Mt dung dch c pH = 5, nng ion OH- trong dung dch ny l: lng (Phn trm khi lng) FeCO3 c trong qung Xierit l: a) 10-5 mol ion/l b) 9 mol ion/l c) 5.10-9 mol ion/l d) Tt c u sai a) 50% b) 90% c) 80% d) 60% 64. Cho 624 gam dung dch BaCl2 10% vo 200 gam dung dch H2SO4 (c d). 55. Xem phn ng: Br2 + 2KI 2KBr + I2 Lc b kt ta, ly dung dch cho tc dng vi lng d dung dch a) KI b oxi ha, s oxi ha ca n tng ln Pb(CH3COO)2, thu c 144 gam kt ta. Nng % ca dung dch H 2SO4 lc b) KI b oxi ha, s oxi ha ca n gim xung u l: c) KI b kh, s oxi ha ca n tng ln a) 24,5% b) 14,7% c) 9,8% d) 37,987% d) KI b kh, s oxi ha ca n gim xung (Ba = 137; Cl = 35,5; H = 1; S = 32; O = 16; Pb = 207) 56. Trong phn ng oxi ha kh: 65. Cho mt hp cht ion hirua ha tan trong nc th thu c: a) S in t c bo ton (S e cho bng s e nhn) a) Mt dung dch axit v kh hiro. b) in tch c bo ton b) Mt dung dch axit v kh oxi. c) Khi lng c bo ton c) Mt dung dch baz v kh hiro. d) Tt c u ng

d) Mt dung dch baz v kh oxi. 66. Cho 3,2 gam bt lu hunh (S) vo mt bnh kn c th tch khng i, c mt t cht xc tc rn V2O5 (cc cht rn chim th tch khng ng k). S mol O2 cho vo bnh l 0,18 mol. Nhit ca bnh lc u l 25C, p sut trong bnh l p1. To mi la t chy ht lu hunh. Sau phn ng gi nhit bnh 442,5C, p sut trong bnh by gi p2 gp i p sut p1. Hiu sut chuyn ha SO2 to SO3 l: a) 40% b) 50% c) 60% d) 100% (S = 32) 67. M l mt kim loi. Cho 1,56 gam M tc dng ht vi kh Cl2, thu c cht rn c khi lng nhiu hn so vi kim loi lc u l 3,195 gam. M l: a) Mg b) Cr c) Zn d) Cu (Mg = 24; Cr = 52; Zn = 65; Cu = 64; Cl = 35,5) 68. em nung 3,4 gam mui bc nitrat cho n khi lng khng i, khi lng cht rn cn li l: a) Vn l 3,4 gam, v AgNO3 khng b nhit phn b) 2,32 gam c) 3,08 gam d) 2,16 gam (Ag = 108; N = 14; O = 16) 69. Trn 100 ml dung dch KOH 0,3M vi 100 ml dung dch HNO 3 c pH = 1, thu c 200 ml dung dch A. Tr s pH ca dung dch A l: a) 1,0 b) 0,7 c) 13,3 d) 13,0 70. Phn trm khi lng oxi trong phn chua (Al2(SO4)3.K2SO4.24H2O) l: a) 67,51% b) 65,72% c) 70,25% d) Mt tr s khc (Al = 27; S = 32; O = 16; K = 39; H = 1) 71. Ha tan Fe2(SO4)3 vo nc, thu c dung dch A. Cho dung dch A tc dng vi dung dch Ba(NO3)2 d, thu c 27,96 gam kt ta trng. Dung dch A c cha: a) 0,08 mol Fe3+ b) 0,09 mol SO42c) 12 gam Fe2(SO4)3 d) (b), (c) (Fe = 56; Ba = 137; S = 32; O = 16) 72. Xem phn ng: 0 FexOy + (6x-2y)HNO3(m c) t xFe(NO3)3+(3x-2y)NO2+ (3x-y)H2O a) y phi l mt phn ng oxi ha kh, FexOy l cht kh, n b oxi ha to Fe(NO3)3. b) Trong phn ng ny, HNO3 phi l mt cht oxi ha, n b kh to kh NO2. c) y c th l mt phn ng trao i, c th HNO3 khng ng vai tr cht oxi ha. d) (a) v (b)

73. Ha tan hon ton 15 gam CaCO3 vo m gam dung dch HNO3 c d, thu c 108,4 gam dung dch. Tr s ca m l: a) 93,4 gam b) 100,0 gam c) 116,8 gam d) Mt kt qu khc (Ca = 40; C = 12; O = 16) 74. Xem phn ng: FeS2 + H2SO4(m c, nng) Fe2(SO4)3 + SO2 + H2O Tng s cc h s nguyn nh nht, ng trc mi cht trong phn ng trn, phn ng cn bng cc nguyn t l: a) 30 b) 38 c) 46 d) 50 75. Chn cch lm ng pha long dung dch H 2SO4 98% nhm thu c 196 gam dung dch H2SO4 10%, mt hc sinh thc hin nh sau: a) Ly 176 gam H2O vo 20 gam dung dch H2SO4 98%. b) Ly 20 gam dung dch H2SO4 98% cho t t vo 176 gam H2O. c) (a) v (b) u ng. d) Tt c u ly s lng khng ng. 76. Trn dung dch NaOH 40% vi dung dch NaOH 10% thu c dung dch 30%. Khi lng mi dung dch cn ly em trn thu c 60 gam dung dch NaOH 30% l: a) 20 gam dd NaOH 40%; 40 gam dd NaOH 10% b) 40 gam dd NaOH 40%; 20 gam dd NaOH 10% c) 30 gam dd NaOH 40%; 30 gam dd NaOH 10% d) 35 gam dd NaOH 40%; 25 gam dd NaOH 10% 77. Cho 2,7 gam Al vo 100 ml dung dch NaOH 1,2M. Sau khi kt thc phn ng, thu c dung dch A. Cho 100 ml dung dch HCl 1,8M vo dung dch A, thu c m gam kt ta. Tr s ca m l: a) 7,8 gam b) 5,72 gam c) 6,24 gam d) 3,9 gam (Al = 27; O = 16; H = 1) 78. Dung dch axit clohiric m c c nng 12M v cng l dung dch HCl c nng 36%. Khi lng ring ca dung dch ny l: a) 1,22 g/ml b) 1,10g/ml c) 1,01 g/l d) 0,82 g/l (H = 1; Cl = 35,5) 79. Dung dch hn hp B gm KOH 1M Ba(OH)2 0,75M. Cho t t dung dch B vo 100 ml dung dch Zn(NO3)2 1M, thy cn dng t nht V ml dung dch B th khng cn kt ta. Tr s ca V l: a) 120 ml b) 140 ml c) 160 ml d) 180 ml 80. Chn cu tr li ng CaCO3 + BaCl2 (1) BaCO3 + CaCl2

K2CO3 + Ba(NO3)2 (2) BaCO3 + 2KNO3 CuS + 2NaOH Cu(OH)2 + Na2S (3) CuSO4 + 2NaOH Cu(OH)2 + Na2SO4 (4) a) C bn phn ng (1), (2), (3), (4) u xy ra b) Cc phn ng (1), (2), (4) xy ra c) Cc phn ng (2), (3), (4) xy ra d) Cc phn ng (2), (4) xy ra 81. Cho 100 ml dung dch KOH 3,5M vo 100 ml dung dch AlCl3 1M. Sau khi phn ng xong, thu c m gam kt ta. Tr s ca m l: a) 3,9 gam b) 7,8 gam c) Kt ta b ha tan ht d) Mt tr s khc (Al = 27; O = 16; H = 1) 82. Ch c dng nc, nhn bit c tng kim loi no trong cc b ba kim loi sau y? a) Al, Ag, Ba b) Fe, Na, Zn c) Mg, Al, Cu d) (a), (b) 83. Ha tan ht 2,055 gam mt kim loi M vo dung dch Ba(OH)2, c mt kh thot ra v khi lng dung dch sau phn ng tng 2,025 gam. M l: a) Al b) Ba c) Zn d) Be (Zn = 65; Be = 9; Ba = 137; Al = 27) 84. Nguyn t no c bn knh ion ln hn bn knh nguyn t tng ng? a) Ca b) Ag c) Cs d) Tt c u khng ph hp 85. Ha tan hon ton m gam bt kim loi nhm vo mt lng dung dch axit nitric rt long c d, c 0,03 mol kh N2 duy nht thot ra. Ly dung dch thu c cho tc dng vi lung d dung dch xt, un nng, c 672 ml duy nht mt kh (ktc) c mi khai thot ra. Cc phn ng xy ra hon ton. Tr s ca m l: a) 3,24 gam b) 4,32 gam c) 4,86 gam d) 3,51 gam 86. Vi phn ng: FexOy+2yHCl (3x-2y)FeCl2 + (2y-2x)FeCl3+ yH2O Chn pht biu ng: a) y l mt phn ng oxi ha kh b) Phn ng trn ch ng vi trng hp FexOy l Fe3O4 c) y khng phi l mt phn ng oxi ha kh d) (b) v (c) ng 87. Mt dung dch MgCl2 cha 5,1% khi lng ion Mg2+. Dung dch ny c khi lng ring 1,17 g/ml. C bao nhiu gam ion Cl- trong 300 ml dung dch ny? a) 13,0640 gam b) 22,2585 gam c) 26,1635 gam d) 52,9571 gam

(Mg = 24; Cl = 35,5) 88. Xem phn ng: FeS2 + H2SO4(, nng) Fe2(SO4)3 + SO2 + H2O a) FeS2 b oxi ha to Fe2(SO4)3 b) FeS2 b oxi ha to Fe2(SO4)3 v SO2 c) H2SO4 b oxi ha to SO2 d) H2SO4 oxi ha FeS2 to Fe3+ v SO4289. Th t nhit si tng dn ca cc hirohalogenua nh sau: a) HF < HCl < HBr < HI b) HCl < HBr < HI < HF c) HCl < HF < HBr < HI d) HI < HBr < HCl < HF 90. Cho 0,69 gam Na vo 100 ml dung dch HCl c nng C (mol/l), kt thc phn ng, thu c dung dch A, cho lng d dung dch CuSO4 vo dung dch A, thu c 0,49 gam mt kt ta, l mt hiroxit kim loi. Tr s ca C l: a) 0,2 b) 0,3 c) 0,1 d) Mt gi tr khc (Na = 23; Cu = 64; O = 16; H = 1) 91. C bao nhiu in t trao i trong qu trnh ru etylic b oxi ha to axit axetic? a) 1 b) 2 c) 3 d) 4 92. Cht no s b ha tan nhiu trong axit mnh hn so vi trong nc? a) PbF2 b) PbCl2 c) PbBr2 d) PbI2 93. pH ca dung dch NaH2AsO4 0,1M gn vi tr s no nht? Cho bit axit arsenic H3AsO4 c cc tr s Ka1 = 6,0.10-3 ; Ka2 = 1,1.10-7 ; Ka3 = 3,0.10-12 a) 1,6 b) 2,8 c) 4,0 d) 4,8 94. em nung nng mt lng qung hematit (cha Fe2O3, c ln tp cht tr) v cho lung kh CO i qua, thu c 300,8 gam hn hp cc cht rn, ng thi c hn hp kh thot ra. Cho hp th hn hp kh ny vo bnh ng lng d dung dch xt th thy khi lng bnh tng thm 52,8 gam. Nu ha tan ht hn hp cht rn trong lng d dung dch HNO3 long th thu c 387,2 gam mt mui nitrat. Hm lng Fe2O3 (% khi lng) trong loi qung hematit ny l: a) 2O% b) 40% c) 60% d) 80% (Fe = 56; O = 16; N = 14; C = 12) 95. Kh hay hi cht no c tr s khi lng ring 546C; 1,5 atm bng vi khi lng ring ca kh oxi iu kin tiu chun? a) N2 b) NH3 c) SO2 d) SO3 (N = 14; H = 1; S = 32; O = 16)

96. Ngi ta trn m1 gam dung dch cha cht tan A, c nng phn trm l C1, vi m2 gam dung dch cha cng cht tan, c nng phn trm l C2, thu c dung dch c nng phn trm C. Biu thc lin h gia C, C1, C2, m1, m2 l: m1 C C1 m1 C C2 = = a) b) m2 C2 C m2 C1 C

104. Khi lng NaCl cn thm vo 250 gam dung dch NaCl 10% thu c dung dch 25% l: a) 20 gam b) 30 gam c) 40 gam d) 50 gam 105. Th tch nc (D = 1g/ml) cn thm vo 50 ml dung dch H 2SO4 92% (D = 1,824 g/ml) thu c dung dch H2SO4 12% l: a) 500 ml b) 528 ml c) 608 ml d) 698 ml 106. Ngi ta trn V1 lt dung dch cha cht tan A c t khi d1 vi V2 lt dung m1C1 m2C2 dch cha cng cht tan c t khi d2 thu c V lt dung dch c t khi d. c) C = d) (a), (c) m1 m2 Coi V = V1 + V2. Biu thc lin h gia d, d1, d2, V1, V2 l: V1d1 + V2 d 2 97. Ngi ta trn m1 gam dung dch HNO3 56% vi m2 gam dung dch HNO3 V2 d 2 d V1 d d 2 = = a) d = V + V b) c) d) (a), (c) 20% thu c dung dch HNO3 40%. T l gia m1 : m2 l: V1 d d1 V2 d1 d 1 2 a) 4 : 5 b) 5 : 4 c) 10 : 7 d) 7 : 10 107. Th tch nc cn thm vo dung dch HNO3 c t khi 1,35 thu c 98. Thu c cht no khi un nh mui amoni nitrit? 3,5 lt dung dch HNO3 c t khi 1,11 l: (Coi s pha trn khng lm thay i a) N2, H2O b) N2O; H2O c) N2; O2; H2O d) H2, NH3; O2 th tch) 99. Trn m1 gam dung dch NaOH 10% vi m2 gam dung dch NaOH 40% a) 2,4 lt b) 1,1 lt c) 0,75 lt d) Mt tr s khc thu c 60 gam dung dch 20%. Tr s ca m1, m2 l: 108. Khi lng tinh th FeSO4.7H2O cn dng thm vo 198,4 gam dung a) m1 = 10g; m2 = 50g b) m1 = 40g; m2 = 20g dch FeSO4 5% nhm thu c dung dch FeSO4 15% l: c) m1 = 35g; m2 = 25g d) m1 = 45g; m2 = 15g a) 65,4 gam b) 50 gam c) 30,6 gam 100. H s nguyn nh nht ng trc ion OH- phn ng sau y d) Tt c u khng ng ...Cl2 + ...OH- ...Cl- + ...ClO3- + ...H2O (Fe = 56; S = 32; O = 16; H = 1) cn bng s nguyn t cc nguyn t l: 109. Cho 7,04 gam kim loi ng c ha tan ht bng dung dch HNO3, thu a) 3 b) 6 c) 12 d) 18 c hn hp hai kh l NO2 v NO. Hn hp kh ny c t khi so vi hiro 101. em nung 1,50 gam mt mui cacbonat mt kim loi cho n khi lng bng 18,2. Th tch mi kh thu c ktc l: khng i, thu c 268,8 cm3 cacbon ioxit (ktc). Kim loi trong mui a) 0,896 lt NO2; 1,344 lt NO b) 2,464 lt NO2; 3,696 lt NO cacbonat trn l: c) 2,24 lt NO2; 3,36 lt NO d) Tt c s liu trn khng ph hp vi a) Ca b) Mn c) Ni d) Zn d kin u bi (Ca = 40; Mn = 55; Ni = 59; Zn = 65) (Cu = 64; N = 14; O = 16; H = 1) 102. em nung m gam hn hp A cha hai mui cacbonat ca hai kim loi 110. Mu vt cht no di y khng nguyn cht? u thuc phn nhm chnh nhm II trong bng h thng tun hon, thu c a) NaCl (lng) b) Ru etylic c) H2O (rn) d) Ru 40 x gam hn hp B gm cc cht rn v c 5,152 lt CO2 thot ra. Th tch cc 111. Cho m gam bt kim loi ng vo 200 ml dung dch HNO 2M, c kh 3 kh u o ktc. em ha tan ht x gam hn hp B bng dung dch HCl th NO thot ra. ha tan va ht cht rn, cn thm tip 100 ml dung dch HCl c 1,568 lt kh CO2 thot ra na v thu c dung dch D. em c cn dung 0,8M vo na, ng thi cng c kh NO thot ra. Tr s ca m l: dch D th thu c 30,1 gam hn hp hai mui khan. Tr s ca m l: a) 9,60 gam b) 11,52 gam c) 10,24 gam d) u bi cho a) 26,80 gam b) 27,57 gam c) 30,36 gam d) 27,02 gam khng ph hp 103. Mt hp cht ion cha 29,11% Natri; 40,51% Lu hunh v 30,38% Oxi (Cu = 64) v khi lng. Anion no c cha trong hp cht ny? 112. Cho m gam hn hp gm ba kim loi l Mg, Al v Fe vo mt bnh kn c a) S2O32b) SO42c) S4O62d) SO32th tch khng i 10 lt cha kh oxi, 136,5C p sut trong bnh l 1,428 (Na = 23; S = 32; O = 16) atm. Nung nng bnh mt thi gian, sau a nhit bnh v bng nhit

lc u (136,5C), p sut trong bnh gim 10% so vi lc u. Trong bnh c 3,82 gam cc cht rn. Coi th tch cc cht rn khng ng k. Tr s ca m l: a) 2,46 gam b) 2,12 gam c) 3,24 gam d) 1,18 gam 113. Trn 100 ml dung dch MgCl2 1,5M vo 200 ml dung dch NaOH c pH = 14, thu c m gam kt ta. Tr s ca m l: a) 8,7 gam b) 5,8 gam c) 11,6 gam d) 22,25 gam (Mg = 24; O = 16; H = 1) 114. Sc V lt kh CO2 (ktc) vo 2 lt dung dch Ca(OH)2 0,05M, thu c 7,5 gam kt ta. Cc phn ng xy ra hon ton. Tr s ca V l: a) 1,68 lt b) 2,80 lt c) 2,24 lt hay 2,80 lt d) 1,68 lt hay 2,80 lt (Ca = 40; C = 12; O = 16) 115. Sc kh SO2 dung dch xa th: a) Kh SO2 ha tan trong nc ca dung dch xa to thnh axit sunfur. b) Kh SO2 khng phn ng, t ha tan trong nc ca dung dch sa, thot ra, c mi xc (mi hc). c) SO2 y c CO2 ra khi mui carbonat, ng thi c s to mui sunfit. d) Tt c u khng ph hp. 16. Cho 42 gam hn hp mui MgCO3, CuCO3, ZnCO3 tc dng vi dung dch H2SO4 long, thu c 0,25 mol CO2, dung dch A v cht rn B. C cn dung dch A, thu c 38,1 gam mui khan. em nung lng cht rn B trn cho n khi lng khng i th thu c 0,12 mol CO2 v cn li cc cht rn B. Khi lung ca B v B l: a) 10,36 gam; 5,08 gam b) 12,90 gam; 7,62 gam c) 15, 63 gam; 10,35 gam d) 16,50 gam; 11,22 gam 117. Cho NaHCO3 tc dng vi nc vi trong c d, phn ng xy ra hon ton, tng h s nguyn nh nht ng trc cc cht phn ng ny c s cn bng s nguyn t cc nguyn t l: a) 7 b) 10 c) 5 d) Mt tr s khc 118. Cho lung kh hiro c d qua ng s c ng 9,6 gam bt ng (II) oxit un nng. Cho dng kh v hi thot ra cho hp th vo bnh B ng mui ng (II) sunfat khan c d ng (II) sunfat khan hp th ht cht m n hp th c. Sau th nghim, thy khi lng bnh B tng thm 1,728 gam. Hiu sut ng (II) oxit b kh bi hiro l: a) 50% b) 60% c) 70% d) 80% (Cu = 64; O = 16) 119. Thc hin phn ng nhit nhm vi 3,24 gam Al v m gam Fe 3O4. Ch c oxit kim loi b kh to kim loi. em ha tan cc cht thu c sau phn ng nhit nhm bng dung dch Ba(OH)2 c d th khng thy cht kh to ra v

cui cng cn li 15,68 gam cht rn. Cc phn ng xy ra hon ton. Tr s ca m l: a) 18,56 gam b) 10,44 gam 8,12 gam d) 116,00 gam (Al = 27; Fe = 56; O = 16) 120. Xt cc nguyn t v ion sau y:40 (1): 18Ar (2): 35Cl 17

Cl (3): 1739 K 19

35

(4): 16 S40 Ca 20

32

(5): 16S

32

(6): 16 S40

32 2

(7): 19K

39

(8):

(9):

(10): 40Ca 20

(11): 20Ca

2

Nguyn t, ion c s in t bng s in t ca nguyn t Argon l: a) (1), (3), (5), (8), (10) b) (1), (3), (6), (8), (11) c) (1), (11), (8), (3), (9) d) (1), (2), (4), (7), (9) 121. Gi s gang cng nh thp ch l hp kim ca St vi Cacbon v St ph liu ch gm St, Cacbon v Fe2O3. Coi phn ng xy ra trong l luyn thp Martin l: 0 Fe2O3 + 3C t 2Fe + 3CO Khi lng St ph liu (cha 40% Fe 2O3, 1%C) cn dng khi luyn vi 4 tn gang 5%C trong l luyn thp Martin, nhm thu c loi thp 1%C, l: a) 1,50 tn b) 2,93 tn c) 2,15 tn d) 1,82 tn (Fe = 56; O = 16; C = 12) 122. Ion CO32- cng hin din chung trong mt dung dch vi cc ion no sau y? a) Na+; NH4+; Mg2+ b) H+; K+; NH4+ c) K+; Na+; OH- d) Li+; Ba2+; Cl123. Khi cho dung dch canxi bicacbonat (c d) tc dng vi dung dch xt, tng h s nguyn nh nht ng trc cc cht trong phn ng phn ng ny cn bng s nguyn t cc nguyn t l: a) 5 b) 6 c) 7 d) 8 124. Cho V lt (ktc) CO2 hp thu ht vo dung dch nc vi c ha tan 3,7 gam Ca(OH)2, thu c 4 gam kt ta trng. Tr s ca V l: a) 0,896 lt b) 1,344 lt c) 0,896 lt v 1,12 lt d) (a) v (b) (Ca = 40; O = 16; H = 1; C = 12) 125. Cho 1,12 lt kh sunfur (ktc) hp thu vo 100 ml dung dch Ba(OH) 2 c nng C (mol/l), thu c 6,51 gam kt ta. Tr s ca C l: a) 0,3M b) 0,4M c) 0,5M d) 0,6M (Ba = 137; S = 32; O = 16)

126. Trn 100 ml dung dch H2SO4 0,12M vi 300 ml dung dch KOH c pH = 13. Thu c 400 ml dung dch A. Tr s pH ca dung dch A gn vi tr s no nht di y? a)11,2 b) 12,2 c) 12,8 d) 5,7 127. Cht no c tnh kh tt nht trong cc cht sau y? a) CuO b) SiO2 c)NO2 d) SO2 128. em nung hn hp A, gm hai kim loi: x mol Fe v 0,15 mol Cu, trong khng kh mt thi gian, thu c 63,2 gam hn hp B, gm hai kim loi trn v hn hp cc oxit ca chng. em ha tan ht lng hn hp B trn bng dung dch H2SO4 m c, th thu c 0,3 mol SO2. Tr s ca x l: a) 0,7 mol b) 0,6 mol c) 0,5 mol d) 0,4 mol (Fe = 56; Cu = 64; O = 16) 129. Cho cc cht: Al, Zn, Be, Al2O3, ZnO, Zn(OH)2, CrO, Cr2O3, CrO3, Ba, Na2O, K, MgO, Fe. Cht no ha tan c trong dung dch Xt? a) Al, Zn, Al2O3, Zn(OH)2, BaO, MgO b) K, Na2O, CrO3, Be, Ba c) Al, Zn, Al2O3, Cr2O3, ZnO, Zn(OH)2 d) (b), (c) 130. Ion icromat Cr2O72-, trong mi trng axit, oxi ha c mui Fe2+ to mui Fe3+, cn icromat b kh to mui Cr3+. Cho bit 10 ml dung dch FeSO4 phn ng va vi 12 ml dung dch K2Cr2O7 0,1M, trong mi trng axit H2SO4. Nng mol/l ca dung dch FeSO4 l: a) 0,52M b) 0,62M c) 0,72M d) 0,82M 131. Cho 2,24 gam bt st vo 100 ml dung dch AgNO3 0,9M. Khuy u phn ng xy ra hon ton. Dung dch sau phn ng c: a) 7,26 gam Fe(NO3)3 b) 7,2 gam Fe(NO3)2 c) c (a) v (b) d) Mt tr s khc (Fe = 56; N = 14; O = 16) 132. Cho t t dung dch HCl 35% vo 56,76 ml dung dch NH 3 16% (c khi lng ring 0,936 gam/ml) 20C, cho n khi trung ha va , thu c dung dch A. Lm lnh dung dch A v 0C th thu c dung dch B c nng 22,9% v c m gam mui kt ta. Tr s ca m l: a) 2,515 gam b) 2,927 gam c) 3,014 gam d) 3,428 gam (N = 14; H = 1; Cl = 35,5) 133. Mt hc sinh thc hin hai th nghim sau: - Ly 16,2 gam Ag em ha tan trong 200 ml dung dch HNO3 0,6M, thu c V lt NO (ktc) - Ly 16,2 gam Ag em ha tan trong 200 ml dung dch hn hp HNO3 0,6M H2SO4 0,1M, thu c V lt NO (ktc). Cc phn ng xy ra hon ton, coi H2SO4 long phn ly hon ton to 2H+ v SO42-.

a) V = V = 0,672 lt b) V = 0,672 lt; V = 0,896 lt c) Hai th tch kh trn bng nhau, nhng khc vi kt qu cu (a) d) Tt c u khng ph hp 134. Cho 4,48 lt hi SO3 (ktc) vo nuc, thu c dung dch A. Cho vo dung dch A 100 ml dung dch NaOH 3,5M, thu c dung dch B. C cn dung dch B, thu c hn hp R gm hai cht rn. Khi lng mi cht trong R l: a) 6,0 g; 21,3 g b) 7,0 g; 20,3 g c) 8,0 g; 19,3 g d) 9,0 g, 18,3 g (Na = 23; S = 32; O = 16; H = 1) 135. Sc V lt CO2 (ktc) vo 1 lt dung dch hn hp Ca(OH)2 0,02M v NaOH 0,1M. Sau khi kt thc phn ng, thu c 1,5 gam kt ta trng. Tr s ca V l: a) 0,336 lt b) 2,800 lt c) 2,688 lt d) (a), (b) (Ca = 40; C = 12; O = 16) 136. Tnh cht ha hc c bn ca kim loi l: a) Tc dng vi phi kim to mui b) Tc dng vi axit thng thng to mui v kh hiro c) y c kim loi yu hn ra khi dung dch mui d) Kim loi c tnh kh, n b oxi ha to hp cht ca kim loi 137. Cho dung dch cha x mol NaAlO2 tc dng vi dung dch cha y mol HCl. T l T=x/y phi nh th no thu c kt ta? a) T = 0,5 b) T = 1 c) T > 1/4 d) T < 1/4 138. V ml dung dch A gm hn hp hai axit HCl 0,1M v H2SO4 0,1M trung ha va 30 ml dung dch B gm hn hp hai baz NaOH 0,8M v Ba(OH) 2 0,1M. Tr s ca V l: a) 50 ml b) 100 ml c) 120 ml d) 150 ml 139. T 3 tn qung pirit (cha 58% FeS2 v khi lng, phn cn li l cc tp cht tr) iu ch c bao nhiu tn dung dch H2SO4 98%, hiu sut chung ca qu trnh iu ch l 70%? a) 2,03 tn b) 2,50 tn c) 2,46 tn d) 2,90 tn (Fe = 56; S = 32; O = 16; H = 1) 140. Hp cht no m phn t ca n ch gm lin kt cng ha tr? a) HCl b) NaCl c) LiCl d) NH4Cl 141. Ha tan m gam Al va trong V (ml) dung dch H2SO4 61% (c khi lng ring 1,51 g/ml), un nng, c kh mi xc thot ra, c 2,88 gam cht rn vng nht lu hunh (S) v dung dch D. Cho hp thu ht lng lng kh mi xc trn vo dung dch nc vi trong d, thu c 21,6 gam kt ta mui sunfit. Cc phn ng xy ra hon ton. Tr s ca m l:

b) 2,7 gam c) 5,4 gam d) 8,1 gam (Al = 27; H = 1; S = 32; O = 16: Ca = 40) 142. Tr s V ca cu 141 l: a) 76,6 ml b) 86,6 ml c) 96,6 ml d) 106,6 ml 143. Clorua vi c cng thc l: a) Hn hp hai mui: CaCl2 - Ca(ClO)2 b) Hn hp: CaCl2 - Ca(ClO3)2 c) CaOCl2 d) (a) hay (c) 144. Cho kh Clo tc dng vi dung dch Xt m c, nng, thu c: a) Nc Javel b) Hn hp hai mui: NaCl NaClO c) Hn hp hai mui: NaCl NaClO3 d) (a) hay (b) 145. Kh than t l: a) Hn hp kh: CO H2 b) Hn hp kh: CO CO2 H2 c) Hn hp: C hi nc d) Hn hp: C O2 N2 H2O 146. Hn hp A gm cc kh: CO, CO2 v H2 c to ra do hi nc tc dng vi than nng nhit cao. Cho V lt hn hp A (ktc) tc dng hon ton vi ZnO lng d, un nng. Thu c hn hp cht rn B v hn hp kh hi K. Ha tan ht hn hp B bng dung dch HNO 3 m c th thu c 8,8 lt kh NO2 duy nht (o 27,3C; 1,4 atm). Khi lng than dng to c V lt hn hp A (ktc) l (bit rng cc phn ng to hn hp A c hiu sut 80% v than gm Cacbon c ln 4% tp cht tr) a) 1,953 gam b) 1,25 gam c) 1,152 gam d) 1,8 gam (C = 12) 147. Nu V = 6,16 lt, th % th tch mi kh trong hn hp A cu 146 l: a) 40%; 10%; 50% b) 35,55%; 10,25%; 54,20% c) 42,86%; 15,37%; 41,77% d) 36,36%; 9,09%; 54,55% 148. Hn hp A gm cc kim loi b ha tan ht trong dung dch NaOH, to dung dch trong sut. A c th gm: a) Al, Zn, Cr, Mg, Na, Ca b) K, Ba, Al, Zn, Be, Na c) Al, Zn, Be, Sn, Pb, Cu d) (a), (b) 149. in phn l: a) Nh hin din dng in mt chiu m c s phn ly to ion trong dung dch hay cht in ly nng chy. b) S phn ly thnh ion c mang in tch ca cht in ly trong dung dch hay cht in ly trng thi nng chy.

a) 10,8 gam

c) Nh hin din dng din m cc ion di chuyn v cc in cc tri du, c th ion dng s v cc m v ion s v cc dng lm cho dung dch ang trung ha in tr thnh lng cc m dng ring. d) Tt c u khng ng hay cha ni ln bn cht ca hin tng in phn. 150. em in phn 100 ml dung dch AgNO3 c nng C (mol/l), dng in cc tr. Sau mt thi gian in phn, thy c kim loi bm vo catot, catot khng thy xut hin bt kh, anot thy xut hin bt kh v thu c 100 ml dung dch c pH = 1. em c cn dung dch ny, sau em nung nng cht rn thu c cho n khi lng khng i th thu c 2,16 gam mt kim loi. Coi s in phn v cc qu trnh khc xy ra vi hiu sut 100%. Tr s ca C l: a) 0,3M b) 0,2M c) 0,1M d) 0,4M (Ag = 108) 151. Khi in phn dung dch cha cc ion: Ag+, Cu2+, Fe3+. Th t cc ion kim loi b kh catot l: a) Ag+ > Cu2+ > Fe3+ b) Fe3+ > Ag+ > Cu2+ > Fe 2+ + 3+ 2+ c) Ag > Fe > Cu d) Ag+ > Fe 3+ > Cu 2+ > Fe 2+ 152. S in phn v s in ly c g khc bit? a) Ch l hai t khc nhau ca cng mt hin tng l s phn ly to ion ca cht c th phn ly thnh ion c ( l cc mui tan, cc baz tan trong dung dch, cc cht mui, baz, oxit kim loi nng chy) b) Mt ng l s oxi ha kh nh hin din dng in, mt ng l s phn ly to ion ca cht c th phn ly thnh ion. c) S in phn l s phn ly ion nh dng in, cn s in ly l s phn ly ion nh dung mi hay nhit lng (vi cc cht in ly nng chy) d) Tt c u khng ng. 153. Cu hnh electron ca ion Fe3+ l: a) 1s2 2s2 2p6 3s2 3p6 4s2 3d3 b) 1s2 2s2 2p6 3s2 3p6 3d3 4s2 c) (a) hay (b) d) Tt c u sai (Cho bit Fe c Z = 26) 154. Ngi ta pha long dung dch H2SO4 c pH = 1 bng cch thm nc ct vo thu c dung dch c pH = 3. Ngi ta pha long dung dch H 2SO4 bao nhiu ln? a) 10 ln b) 20 ln c) 100 ln d) 200 ln 155. Mt ngi thm nc ct vo dung dch NaOH c pH = 14 nhm thu c dung dch c pH = 13. Ngi pha long dung dch NaOH bao nhiu ln? a) 5 ln b) 10 ln c) 50 ln d) 100 ln

156. Tch s ion ca nc 25C l [H+][OH-] = 10-14. in ly ca nc (% phn ly ion ca nc) 25C l: a) 1,8.10-7% b) 0,018% c) 10-5% d) Tt c u sai -14 157. Tch s ion ca nc 25C bng 10 . Trung bnh trong bao nhiu phn t nc th s c mt phn t nc phn ly ion 25C ? a) Khong 10 triu phn t b) Khong 555 triu phn t c) Khong 1 t phn t d) Khong trn 5 555 phn t 158. pH ca dung dch HCl 10-7M s c gi tr nh th no? a) pH = 7 b) pH > 7 c) pH < 7 d) Tt c u khng ph hp 159. Tr s chnh xc pH ca dung dch HCl 10-7M l: a) 7 b) 6,79 c) 7,21 d) 6,62 160. Cho 200 ml dung dch NaOH pH = 14 vo 200 ml dung dch H2SO4 0,25M. Thu c 400 ml dung dch A. Tr s pH ca dung dch A bng bao nhiu? a) 13,6 b) 1,4 c) 13,2 d) 13,4 161. T cc cp oxi ha kh: Al3+/Al; Cu2+/Cu; Zn2+/Zn; Ag+/Ag, trong nng cc mui bng nhau, u bng 1 mol/lt, s pin in ha hc c th to c ti a bng bao nhiu? a) 3 b) 5 c) 6 d) 7 162. Nhng mt ming kim loi X vo 200 ml dung dch AgNO3 1M, sau khi kt thc phn ng, khi lng ming kim loi c khi lng tng 15,2 gam. Cho bit tt c kim loi bc to ra u bm vo ming loi X. Kim loi X l: a) ng b) St c) Km d) Nhm (Ag = 108; Cu = 64; Fe = 56; Zn = 65; Al = 27) 163. Nhn ca nguyn t no c cha 48 ntron (neutron)? a) K b) Ca c) Hg d) Sr 164. Hai kim loi A, B u c ha tr II. Ha tan ht 0,89 gam hn hp hai kim loi ny, trong dung dch HCl. Sau phn ng thu c 448 ml kh H2 (ktc). Hai kim loi A, B l: a) Mg, Ca b) Zn, Fe c) Ba, Fe d) Mg, Zn (Mg = 24; Ca = 40; Zn = 65, Fe = 56; Ba = 137) 165. Lc tng tc no khin cho c s to lin kt ha hc gia cc nguyn t to phn t? a) Gia cc nhn nguyn t b) Gia cc in t c) Gia in t vi cc nhn nguyn t d) Gia proton v nhn nguyn t

166. Cho x mol Al v y mol Zn vo dung dch cha z mol Fe2+ v t mol Cu2+. Cho bit 2t/3 < x . Tm iu kin ca y theo x,z,t dung dch thu c c cha 3 loi ion kim loi. Cc phn ng xy ra hon ton. a) y < z -3x/2 +t b) y < z-3x + t c) y < 2z + 3x t d) y < 2z 3x + 2t 167. Cho a mol Mg v b mol Fe vo dung dch cha c mol Cu2+ v d mol Ag+. Sau khi phn ng hon ton, dung dch thu c c cha hai ion kim loi. Cho bit a>d/2 . Tm iu kin ca b theo a, c, d c kt qu ny. a) b = (c+d-2a)/2 b) b c a d/2 c) b c a + d/2 d) b > c a 168. in phn 100 ml dung dch NaCl 0,5M, dng in cc tr, c mng ngn xp, cng dng in 1,25 A, thu c dung dch NaOH c pH = 13. Hiu sut in phn 100%, th tch dung dch coi nh khng thay i. Thi gian in phn l: a) 12 pht b) 12 pht 52 giy c) 14 pht 12 giy d) 10 pht 40 giy 169. Ion no c bn knh ln nht trong cc ion di y? a) Na+ b) K+ 2+ c) Mg d) Ca2+ (Tr s Z ca Na, K, Mg, Be ln lt l: 11, 19, 12, 20) 170. Ha tan ht 17,84 gam hn hp A gm ba kim loi l st, bc v ng bng 203,4 ml dung dch HNO3 20% (c khi lng ring 1,115 gam/ml) va . C 4,032 lt kh NO duy nht thot ra (ktc) v cn li dung dch B. em c cn dung dch B, thu c m gam hn hp ba mui khan. Tr s ca m l: a) 51,32 gam b) 60,27 gam c) 45,64 gam d) 54,28 gam (N = 14; O = 16; H = 1) 171. Dn chm V lt (ktc) hn hp hai kh H2 v CO qua ng s ng 20,8 gam hn hp gm ba oxit l CuO, MgO v Fe2O3, un nng, phn ng xy ra hon ton. Hn hp kh, hi thot ra khng cn H2 cng nh CO v hn hp kh hi ny c khi lng nhiu hn khi lng V lt hn hp hai kh H2, CO lc u l 4,64 gam. Trong ng s cn cha m gam hn hp cc cht rn. Tr s ca V l: a) 5,600 lt b) 2,912 lt c) 6,496 lt d) 3,584 lt (O = 16) 172. Tr s ca m cu (171) trn l a) 12,35 gam b) 14,72 gam c) 15,46 d) 16,16 gam

173. C bao nhiu tr s di lin gia C vi C trong phn t C5H10 ? a) 3 b) 4 c) 2 d) 11 174. Mt ngi iu ch kh Clo bng cch cho axit Clohiric m c tc dng vi Mangan ioxit un nng. Nu phn ng hon ton, khi lng dung dch HCl 36% cn dng iu ch c 2,5 gam kh Clo l bao nhiu? a) 5,15 gam b) 14,28 gam c) 19,40 gam d) 26,40 gam (Cl = 35,5; H = 1) 175. Khng th dng NaOH rn lm kh cc kh m no di y? a) CH3NH2; N2 b) NH3; CO c) H2; O2 d) CO2; SO2 176. Dng KOH rn c th lm kh cc cht no di y? a) SO3; Cl2 b) (CH3)3N; NH3 c) NO2; SO2 d) Kh hirosunfua (H2S) kh hiroclorua (HCl) 177. in phn dung dch NaCl, dng in cc tr, c vch ngn, thu c 200 ml dung dch c pH = 13. Nu tip tc in phn 200 ml dung dch ny cho n ht kh Clo thot ra anot th cn thi gian 386 giy, cng dng in 2 A. Hiu sut in phn 100%. Lng mui n c trong dung dch lc u l bao nhiu gam? a) 2,808 gam b) 1,638 gam c) 1,17 gam d) 1,404 gam (Cl = 35,5; Na = 23) 178. Cho 72,6 gam hn hp ba mui CaCO3, Na2CO3 v K2CO3 tc dng ht vi dung dch HCl, c 13,44 lt kh CO2 thot ra ktc. Khi lng hn hp mui clorua thu c bng bao nhiu? a) 90 gam b) 79,2 gam c) 73,8 gam d) Mt tr s khc (C = 12; O = 16; Cl = 35,5) 179. Mt ming vng hnh hp dp c kch thc 25,00mm x 40,00mm x 0,25mm c khi lng 4,830 gam. Khi lng ring ca vng bng bao nhiu? a) 11,34g/ml b) 13,3g/ml c) 19,3g/ml d) 21,4g/ml 180. Crom c khi lng nguyn t bng 51,996. Crom c 4 nguyn t ng v trong t nhin. Ba nguyn t ng v trong bn nguyn t ng v ca Crom l: 50Cr c khi lng nguyn t 49,9461 (chim 4,31% s nguyn t); 52Cr c khi lng nguyn t 51,9405 (chim 83,76% s nguyn t); v 54Cr c khi lng nguyn t 53,9589 (chim 2,38% s nguyn t). Khi lng nguyn t ca ng v cn li ca Cr bng bao nhiu? a) 54,9381 b) 49,8999 c) 50,9351 d) 52,9187

181. Cho dung dch KHSO4 vo lng d dung dch Ba(HCO3)2. a) Khng hin tng g v khng c phn ng ha hc xy ra b) C si bt kh CO2, to cht khng tan BaSO4, phn dung dch c K2SO4 v H2O c) C si bt kh, to cht khng tan BaSO4, phn dung dch c cha KHCO3 v H2O d) C to hai cht khng tan BaSO4, BaCO3, phn dung dch cha KHCO3, H2O 182. Ion M2+ c cu hnh electron l 1s22s22p63s23p6 a)Tr s Z ca M2+ bng 20 b) Tr s Z ca M2+ bng 18 c) Nguyn t M th 20, chu k 3 d) M l mt kim loi c tnh kh mnh, cn ion M2+ c tnh oxi ha mnh (Z: s th t nguyn t, s hiu nguyn t) 183. Khi sc t t kh CO2 lng d vo dung dch NaAlO2, thu c: a) Lc u c to kt ta (Al(OH)3), sau kt ta b ha tan (to Al(HCO3)3) v NaHCO3 b) C to kt ta (Al(OH)3), phn dung dch cha Na2CO3 v H2O c) Khng c phn ng xy ra d) Phn khng tan l Al(OH)3, phn dung dch gm NaHCO3 v H2O 184. KMnO4 trong mi trng axit (nh H2SO4) oxi ha FeSO4 to Fe2(SO4)3, cn KMnO4 b kh to mui Mn2+. Cho bit 10 ml dung dch FeSO4 nng C (mol/l) lm mt mu va 12 ml dung dch KMnO4 0,1M, trong mi trng axit H2SO4. Tr s ca C l: a) 0,6M b) 0,5M c) 0,7M d) 0,4M 185. Dung dch no khng lm i mu qu tm? a) Na2CO3 b) NH4Cl c) CH3COOH d) NaNO3 186. Dung dch mui X khng lm i mu qu tm, dung dch mui Y lm i mu qu tm ha xanh. em trn hai dung dch th thu c kt ta. X, Y c th l: a) BaCl2, CuSO4 b) MgCl2; Na2CO3 c) Ca(NO3)2, K2CO3 d) Ba(NO3)2, NaAlO2 187. Cho 6,48 gam bt kim loi nhm vo 100 ml dung dch hn hp Fe2(SO4)3 1M v ZnSO4 0,8M. Sau khi kt thc phn ng, thu c hn hp cc kim loi c khi lng m gam. Tr s ca m l: a) 16,4 gam b) 15,1 gam c) 14,5 gam d) 12,8 gam (Al = 27; Fe = 56; Zn = 65)

188. in phn dung dch mui nitrat ca kim loi M, dng in cc tr, cng dng in 2 A. Sau thi gian in phn 4 gi 1 pht 15 giy, khng thy kh to catot. Khi lng catot tng 9,75 gam. S in phn c hiu sut 100%, ion kim loi b kh to thnh kim loi bm ht vo catot. M l kim loi no? a) Km b) St c) Nhm d) ng (Zn = 65; Fe = 56; Al = 23; Cu = 64) 189. Gia mui icromat (Cr2O72-), c mu da cam, v mui cromat (CrO42-), c mu vng ti, c s cn bng trong dung dch nc nh sau: Cr2O72- + H2O 2CrO42+ 2H+ (mu da cam) (mu vng ti) Nu ly ng nghim ng dung dch kali icromat (K 2Cr2O7), cho t t dung dch xt vo ng nghim trn th s c hin tng g? a) Thy mu da cam nht dn do c s pha long ca dung dch xt b) Khng thy c hin tng g l, v khng c xy ra phn ng c) Ha cht trong ng nghim nhiu dn, mu dung dch trong ng nghim khng i d) Dung dch chuyn dn sang mu vng ti 190. Cho lung kh CO i qua ng s cha a gam hn hp A gm CuO, Fe2O3 v MgO, un nng. Sau mt thi gian, trong ng s cn li b gam hn hp cht rn B. Cho hp th hon ton kh no b hp th trong dung dch Ba(OH)2 d ca hn hp kh thot ra khi ng s, thu c x gam kt ta. Biu thc ca a theo b, x l: a) a = b - 16x/197 b) a = b + 16x/198 c) a = b 0,09x d) a = b + 0,09x (Ba = 137; C = 12; O = 16) 191. X l mt nguyn t ha hc. X c tng s ht proton, ntron, electron l 115. Trong s ht mang in nhiu hn s ht khng mang in l 25 ht. V tr ca X trong bng h thng tun hon l: a) th 35, chu k 4, phn nhm chnh nhm VII (VIIA) b) th 35, chu k 4, phn nhm chnh nhm V (VA) c) th 30, chu k 4, phn nhm chnh nhm II (IIA) d) th 30, chu k 4, phn nhm ph nhm II (IIB) 192. phn bit hai kh CO2 v SO2, ngi ta dng: a) Dung dch nc vi trong, CO2 s lm nc vi c cn SO2 th khng b) Dng nc brom c) Dng dung dch KMnO4 d) (b), (c)

193. H s ng trc cht b oxi ha bn tc cht phn ng 0 t FexOy + CO FemOn + CO2 cn bng s nguyn t cc nguyn t l: a) m b) nx my c) my nx d) mx 2ny 194. So snh s phn ly ion v s dn in gia hai dung dch CH3COOH 0,1M v dung dch CH3COOH 1M. a) Dung dch CH3COOH 0,1M phn ly ion tt hn v dn in tt hn dung dch CH3COOH 1M. b) Dung dch CH3COOH 0,1M phn ly ion tt hn dung dch CH3COOH 1M, nhng dn in km hn dung dch CH3COOH 1M. c) Dung dch CH3COOH 1M phn ly ion kh hn v dn in km hn so vi dung dch CH3COOH 0,1M. V dung dch cht in ly no c nng ln th in ly nh. d) (a), (c) 195. Cho a mol bt km vo dung dch c ha tan b mol Fe(NO3)3. Tm iu kin lin h gia a v b sau khi kt thc phn ng khng c kim loi. a) b 2a b) b = 2a/3 c) a 2b d) b > 3a 196. Cho 32 gam NaOH vo 200 ml dung dch H3PO4 1,5M, sau khi phn ng xong, em c cn dung dch, tng khi lng cc mui khan c th thu c l: a) 43,3 gam b) 75,4 gam c) 47,0 gam d) 49,2 gam (Na = 23; O = 16; H = 1; P = 31) 197. Cho 2,055 gam kim loi X vo lng d dung dch CuCl2, thy c to mt kh thot ra v to 1,47 gam kt ta. X l kim loi g? a) Na b) K c) Ca d) Ba (Na = 23; K = 39; Ca = 40; Ba = 137; Cu = 64; O = 16; H = 1) 198. em ngm ming kim loi st vo dung dch H 2SO4 long. Nu thm vo vi git dung dch CuSO4 th s c hin tng g? a) Lng kh bay ra khng i b) Lng kh bay ra nhiu hn c) Lng kh thot ra t hn d) Lng kh s ngng thot ra (do kim loi ng bao quanh ming st)

199. Sc 9,52 lt SO2 (ktc) vo 200 ml dung dch hn hp: NaOH 1M Ba(OH)2 0,5M KOH 0,5M. Kt thc phn ng thu c m gam kt ta. Tr s ca m l: a) 16,275 gam b) 21,7 gam c) 54,25 gam d) 37,975 gam (Ba = 137; S = 32; O = 16) 200. Hn hp A gm cc kh Cl2, HCl v H2. Cho 250 ml hn hp A (tc) vo lng d dung dch KI, c 1,27 gam I2 to ra. Phn kh thot ra khi dung dch KI c th tch 80 ml (ktc). Phn trm th tch mi kh trong hn hp A l: a) 40%; 25%; 35% b) 42,5%; 24,6%; 39,5% c) 44,8%; 23,2%; 32,0% d) 50% ; 28%; 22% (I = 127) 201. em nung 14,52 gam mt mui nitrat ca mt kim loi cho n khi lng khng i, cht rn cn li l mt oxit kim loi, c khi lng gim 9,72 gam so vi mui nitrat. Kim loi trong mui nitrat trn l: a) Cu b) Zn c) Ag d) Fe (N = 14; O = 16; Cu = 64; Zn = 65; Ag = 108; Fe = 56) 202. Dn 1,568 lt hn hp A (ktc) gm hai kh H2 v CO2 qua dung dch c ha tan 0,03 mol Ba(OH)2, thu c 3,94 gam kt ta. Phn trm th tch mi kh trong hn hp A l: a) 71,43%; 28,57% b) 42,86%; 57,14% c) (a), (b) d) 30,72%; 69,28% (Ba = 137; C = 12; O = 16) 203. Phn ng no khng phi l phn ng oxi ha kh? a) 2NO2 + 2NaOH NaNO2 + NaNO3 + H2O b) Al4C3 + 12H2O 3CH4 + 4Al(OH)3 c) 3Fe(OH)2 + 10HNO3 3Fe(NO3)3 + NO + 8H2O d) KNO3 KNO2 + 1/2O2 204. Sp theo th t pH tng dn cc dung dch mui c cng nng mol/l: (I): KCl; (II): FeCl2; (III): FeCl3; (IV): K2CO3 a) (III) < (II) < (I) < (IV) b) (I) < (II) < (III) < (IV) c) (IV) < (III) < (II) < (I) d) (II) < (III) < (I) < (IV) 205. Nhit mt kh tng t 0C n 10C p sut khng i, th th tch ca kh s thay i nh th no so vi th tch lc u? a) tng khong 1/273 b) tng khong 10/273 c) gim khong 1/273 d) gim khong 10/273 206. Cho bit s th t nguyn t Z (s hiu nguyn t) ca cc nguyn t: S, Cl, Ar, K, Ca ln lt l: 16, 17, 18, 19, 20. Xem cc ion v nguyn t sau: (I):

S2-; (II): Cl-; (III): Ar; (IV): K+; (V): Ca2+. Th t bn knh tng dn cc ion, nguyn t trn nh l: a) (I) < (II) < (III) < (IV) < (V) b) (V) < (IV) < (III) < (II) < (I) c) (V) < (IV) < (III) (II) > (IV) > (I) b) (III) > (IV) > (II) > (I) c) (III) > (II) > (I) > (IV) d) (IV) > (III) > (II) > (I) 242. X, Y, Z l ba nguyn t ha hc c cu hnh electron lp ha tr ln lt l: 2s22p3; 3s23p3; 4s24p3. a. Tnh kim loi gim dn: X > Y > Z b. Tnh oxi ha tng dn: X < Y < Z c. Tnh phi kim gim dn: X > Y > Z d. Bn knh nguyn t gim dn: X > Y > Z 243. Ngi ta nhn thy ni cc mi hn kim loi d b r (g, mau h) hn so vi kim loi khng hn, nguyn nhn chnh l: a. Do kim loi lm mi hn khng chc bng kim loi c hn b. Do kim loi ni mi hn d b n mn ha hc hn c. Do ni mi hn thng l hai kim loi khc nhau nn c s n mn in ha hc d. Tt c cc nguyn nhn trn 244. Coi phn ng: 2NO(k) + O2(k) 2NO2(k) l phn ng n gin (phn ng mt giai on). Nu lm gim bnh cha hn hp kh trn mt na (tc l tng nng mol/l cc cht trong phn ng trn hai ln) th vn tc phn ng trn s nh th no? a) Vn tc phn ng tng hai ln b) Vn tc phn ng tng 8 ln c) Vn tc phn ng khng thay i d) Vn tc phn ng s gim v vn tc phn nghch tng nhanh hn

245. Xem phn ng cn bng sau y l phn ng n gin: 2SO2(k) + O2(k) 2SO3(k) Phn ng trn ang trng thi cn bng trong mt bnh cha nhit xc nh. Nu lm gim th tch bnh cha mt na, tc lm tng nng mol/lt cc cht trong phn ng trn gp i th: a) Vn tc phn ng tng 8 ln b) Vn tc phn ng nghch tng 4 ln c) Vn tc phn ng thun tng 8 ln d) Do vn tc phn ng thun tng nhanh hn phn ng nghch, nn phn ng s trn s dch chuyn theo chiu thun 246. Ha tan hn hp qung Xierit (cha FeCO3) v Pyrit (cha FeS2) bng dung dch axit nitric, thu c hn hp hai kh c t khi so vi Nit bng 80/49. Hai kh l: a) CO2; NO2 b) CO2; NO c) CO2; SO2 d) SO2; N2O (N = 14; C = 12; S = 32; O = 16) 247. Khi lng tinh th CuSO4.5H2O cn thm vo 250 gam dung dch CuSO4 5% nhm thu c dung dch CuSO4 8% l: a) 10 gam b) 12,27 gam c) 13,39 gam d) 14,36 gam (Cu = 64; S = 32; O = 16; H = 1) 248. X l mt trong su mui: AgNO3, Cu(NO3)2, MgCO3, Ba(HCO3)2, NH4HCO3, NH4Cl. em nung X cho n khi lng khng i th thu c cht rn Y, cht rn Y ny ha tan c trong nc to dung dch Z. X l mui no? a) NH4HCO3 b) MgCO3 c) NH4Cl d) Ba(HCO3)2 249. tan ca mui n (NaCl) trong nc 80C l 38,1 gam (ngha l 80C, 100 gam nc ha tan c ti a 38,1 gam NaCl). Khi lm ngui 150 gam dung dch NaCl bo ha 80C v 20C th c m gam mui kt ta, v thu c dung dch c nng 26,4%. Chn kt lun ng: a) S ha tan NaCl trong nc l mt qu trnh ta nhit b) Dung dch bo ha NaCl 80C c nng l 27,59% c) m = 2,42 gam d) (b), (c) 250. Ion A- c 18 in t. in t m nguyn t A nhn vo phn lp, lp in t no ca A? a) phn lp s, lp th t b) phn lp p, lp th ba c) phn lp p, lp th t d) phn lp d, lp th ba

251. Mt cc nc c cha: a mol Ca2+, b mol Mg2+, c mol HCO3-, d mol Cl-, e mol SO42-. Chn pht biu ng: a) y l nc cng tm thi b) y l nc cng vnh cu c) y l nc cng ton phn, nhng ion Ca2+ v SO42- khng th hin din trong cng mt dung dch c, v n s kt hp to kt ta CaSO4 tch khi dung dch d) c = 2(a +b) (d + 2e) 252. Mt dung dch c cha cc ion: x mol M3+; 0,2 mol Mg2+; 0,3 mol Cu2+; 0,6 mol SO42-; 0,4 mol NO3-. C cn dung dch ny thu c 116,8 gam hn hp cc mui khan. M l: a) Cr b) Fe c) Al d) Mt kim loi khc (Mg = 24; Cu = 64; S = 32; O = 16; N = 14; Cr = 52; Fe = 56; Al = 27) 253. Xt phn ng: FeS2 + H2SO4(, nng) Fe2(SO4)3 + SO2 + H2O H s nguyn nh nht ng trc cht oxi ha, cht kh pha tc cht phn ng trn cn bng s nguyn t cc nguyn t l: a) 1; 7 b) 14; 2 c) 11; 2 d) 18; 2 254. Cho dung dch HNO3 long vo mt cc thy tinh c ng 5,6 gam Fe v 9,6 gam Cu. Khuy u phn ng xy ra hon ton, c 3,136 lt kh NO thot ra (ktc), cn li m gam cht khng tan. Tr s ca m l: a) 7,04 gam b) 1,92 gam c) 2,56 gam d) 3,2 gam (Fe = 56; Cu = 64) 255. Xt cc dung dch sau y u c nng 0,1 mol/l: NaCl; HCl; NaOH; Ba(OH)2; NH4Cl; Na2CO3. Tr s pH tng dn ca cc dung dch trn l: a) HCl < NaCl < NH4Cl < Na2CO3 < NaOH < Ba(OH)2 b) HCl < NaCl < Na2CO3 < NH4Cl < NaOH < Ba(OH)2 c) HCl < Na2CO3 < NH4Cl < NaCl < NaOH < Ba(OH)2 d) HCl < NH4Cl < NaCl < Na2CO3 < NaOH < Ba(OH)2 256. Hm lng st trong loi qung st no cao nht? (Ch xt thnh phn chnh, b qua tp cht) a) Hematit b) Pyrit c) Manhetit d) Xierit (Fe = 56; O = 16; S = 32; C = 12) 257. Dung dch D c to ra do ha tan kh NO2 vo dung dch xt c d. Cho bt kim loi nhm vo dung dch D, c 4,48 lt hn hp K gm hai kh (ktc) thot ra, trong c mt kh c mi khai c trng. T khi ca K so vi heli bng 2,375. Phn trm th tch mi kh trong hn hp K l:

a) 50%; 50% c) 30%; 70%

b) 40%; 60% d) 35%; 65% (He = 4; H = 1; N = 14) 258. Hn hp A gm mu vi (cha 80% khi lng CaCO 3) v mu qung Xierit (cha 65% khi lng FeCO3). Phn cn li trong vi v qung l cc tp cht tr. Ly 250 ml dung dch HCl 2,8M cho tc dng vi 38,2 gam hn hp A. Phn ng xy ra hon ton. Kt lun no di y ph hp? a) Khng HCl phn ng ht cc mui Cacbonat b) Cc mui Cacbonat phn ng ht, do c HCl d c) Phn ng xy ra va d) Khng d kin kt lun (Ca = 40; C = 12; O = 16; Fe = 56) 259. C 6 dung dch khng mu, ng trong cc cc khng c nhn: AlCl3; NH4NO3; KNO3; ZnCl2; (NH4)2SO4; K2SO4. Dng c ha cht no di y nhn bit cc dung dch ny? a) NaOH b) NH3 c) Ba d) Pb(NO3)2 260. Cho m gam mt kim loi vo cc nc, thy c si bt kh v thu c dung dch. Cn li cc dung dch thy khi lng tng thm 38m/39 gam. Kim loi cho vo cc nc l: a) Li b) Na c) Ba d) Mt kim loi khc (Li = 7; Na = 23; Ba = 137) 261. Metylamin l mt cht kh c mi khai ging amoniac, metylamin ha tan trong nc v c phn ng mt phn vi nc theo phn ng: CH3NH2 + H2O CH3NH3+ + OHNc trong phn ng trn ng vai tr cht g? a) Axit b) Baz c) Cht b oxi ha d) Cht b kh 262. mt ha cht c th lm phn bn th cn iu kin g? a) Cha cc nguyn t ha hc cn thit cho s dinh dng v tng trng ca cy b) Cha cc nguyn t ha hc cn thit cho s dinh dng, tng trng ca cy v ha cht phi t ha tan trong nc khng b hao ht do nc ma cun tri c) Ha cht phi ha tan c trong nc d) (a), (c)

263. Khi ngi th hn hot ng cng nh khi ct kim loi bng m hn (dng nhit cao ca m hn in kim loi nng chy v t ra), ngoi cc ht kim loi chi sng bn ra cn c mi kht rt kh chu. Mi kht ny ch yu l mi ca cht no? a) Mi ca oxit kim loi b) Mi ca ozon to ra t oxi nhit cao c) Mi ca cc tp cht trong kim loi chy to ra (nh do tp cht S chy to SO2) d) Mi ca hi kim loi bc hi nhit cao 264. Mt oxit st c khi lng 25,52 gam. ha tan ht lng oxit st ny cn dng va 220 ml dung dch H2SO4 2M (long). Cng thc ca oxit st ny l: a) FeO b) Fe2O3 c) Fe3O4 d) FeO4 (Fe = 56; O = 16) 265. 38,9C; 28,4C; 38,9C; 63,7C l nhit nng chy ca cc kim loi c nhit nng chy thp nht: Cs; Rb; Hg; K. Nhit nng chy ca thy ngn (Hg) l: a) 63,7C b) 38,9C c) 28,4C d) 38,9C 266. in phn Al2O3 nng chy trong thi gian 2 gi 40 pht 50 giy, cng dng in 5 A (Ampre), thu c 3,6 gam nhm kim loi catot. Hiu sut ca qu trnh in phn ny l: a) 80% b) 90% c) 100% d) 70% (Al = 27) 267. Trong cc cht v ion: CH3COO-; NH3; NO3-; CO32-; OH-; Cl- ; SO42-; AlO2-; C6H5NH3+; C6H5O- (phenolat); ClO4-; K+; Fe3+; C2H5O- (etylat); S2-; C6H5NH2 (anilin) th cc cht c coi l baz l: a) NH3; OH-; C6H5NH2 b) CH3COO-; NH3; CO32-; OH-; AlO2-; C6H5O-; C2H5O-; S2-; C6H5NH2 c) CH3COO-; CO32-; AlO2-; C6H5O-; ClO4-; C2H5O-; S2d) (a) v (c) 268. Sc 1,792 lt kh SO2 (ktc) vo 250 ml dung dch Ba(OH)2 nng C (mol/l). Phn ng xy ra hon ton, thu c 8,68 gam kt ta. Tr s ca C l: a) 0,16M b) 0,16M v 0,2M c) 0,24M d) (a), (c) (Ba = 137; S = 32; O = 16) 269. H2S c cha S c s oxi ha cc tiu, bng -2. Chn pht biu ng:

a) H2S ch c th ng vai tr cht kh hoc tham gia nh cht trao i, ch khng th ng vai tr cht oxi ha b) Trong phn ng oxi ha, H2S thng b oxi ha to lu hunh n cht c s oxi ho bng 0 hay hp cht SO2 trong S c s oxi ha bng +4. H2S khng bao gi b kh c) Khi tham gia phn ng oxi ha kh, H2S c th ng vai tr cht oxi ha d) (a), (b) 270. Thc hin phn ng nhit nhm gia 6,48 gam Al vi 17,6 gam Fe2O3. Ch c phn ng nhm kh oxit kim loi to kim loi. em ha tan cht rn sau phn ng nhit nhm bng dung dch xt d cho n kt thc phn ng, thu c 1,344 lt H2 (ktc). Hiu sut phn ng nhit nhm l: a) 100% b) 90,9% c) 83,3% d) 70% (Al = 27; Fe = 56; O = 16) 271. Hn hp A dng bt gm Fe2O3 v Al2O3. Cho kh H2 d tc dng hon ton vi 14,12 gam hn hp A nung nng, thu c hn hp cht rn B. Ha tan ht hn hp B bng dung dch HCl th thy thot ra 2,24 lt khi hiro iu kin tiu chun. Phn trm khi lng mi cht trong hn hp A l: a) 56,66% Fe2O3; 43,34% Al2O3 b) 52,48% Fe2O3; 47,52% Al2O3 c) 40% Fe2O3; 60% Al2O3 d) 60% Fe2O3; 40% Al2O3 (Fe = 56; O = 16; Al = 27) 272. Trong cc dung dch sau y: KCl; KHCO3; KHSO4; KOH; KNO3; CH3COOK; C6H5OK (kali phenolat); K2SO4; KI; K2S; KBr; KF; CH3CH2OK; KAlO2; KClO4, dung dch no c pH > 7? a) KOH; CH3COOK; C6H5OK; K2S; CH3CH2OK; KAlO2 b) KOH; KCl; KNO3; K2SO4; KI; KBr; KF; KClO4 c) KOH; KHCO3; CH3COOK; C6H5OK; K2S; CH3CH2OK; KAlO2; KClO4 d) KOH; KHCO3; CH3COOK; C6H5OK; K2S; KF; CH3CH2OK; KAlO2 273. Trong cc dung dch sau y: HCl; NaCl; NH4Cl; FeCl2; C6H5NH3Cl (phenylamoni clorua); BaCl2; CH3NH3Cl; AlCl3; KCl; FeCl3; MgCl2; (CH3)2NH2Cl; CaCl2; NaHSO4; NaHS; ZnCl2; LiCl; CuCl2; NiCl2, dung dch no c pH < 7? a) HCl; NaCl; BaCl2; KCl; MgCl2; CaCl2; NaHSO4; NaHS; LiCl b) HCl; NH4Cl; FeCl2; C6H5NH3Cl; CH3NH3Cl; AlCl3; FeCl3; (CH3)2NH2Cl; NaHSO4; ZnCl2; CuCl2; NiCl2 c) HCl, NH4Cl; FeCl2; C6H5NH3Cl; CH3NH3Cl; AlCl3; FeCl3; MgCl2; (CH3)2NH2Cl; NaHSO4; ZnCl2; CuCl2; NiCl2

d) HCl; NH4Cl; FeCl2; C6H5NH3Cl; CH3NH3Cl; AlCl3; FeCl3; (CH3)2NH2Cl; NaHSO4; NaHS; ZnCl2; CuCl2; NiCl2 274. Ha tan ht m gam bt kim loi nhm trong dung dch HNO3, thu c 13,44 lt (ktc) hn hp ba kh NO, N2O v N2. T l th tch VNO : VN2O : VN2 = 3 : 2 : 1. Tr s ca m l: a) 32,4 gam b) 31,5 gam c) 40,5 gam d) 24,3 gam (Al = 27) 275. H s ng trc FeCl2; FeCl3 phn ng FexOy + HCl FeCl2 + FeCl3 + H2O cn bng s nguyn t cc nguyn t l: a) (y-x); (3x-2y) b) (2x-3y); (2x-2y) c) (3x-y); (2y-2x) d) (3x-2y); (2y-2x) 276. in phn dung dch AgNO3, dng in cc bng bc. Cng dng in 5 A, thi gian in phn 1 gi 4 pht 20 giy. a) Khi lng catot tng do c kim loi bc to ra bm vo b) Khi lng anot gim 21,6 gam c) C 1,12 lt kh O2 (ktc) thot ra anot v dung dch sau in phn c cha 0,2 mol HNO3 d) (a), (c) (Ag = 108) 277. Trn dung dch axit oxalic vi dung dch canxi clorua, c hin tng g xy ra? a) Thy dung dch c, do c to cht khng tan b) Dung dch trong sut, khng c phn ng xy ra, v axit hu c yu (HOOC-COOH) khng tc dng c vi mui ca axit mnh (HCl) c) Lc u dung dch trong, do khng c phn ng, nhng khi un nng thy dung dch c l do phn ng xy ra c nhit cao d) Khi mi vo th dung dch c do c to cht khng tan canxi oxalat, nhng mt lc sau thy kt ta b ha tan, dung dch tr li trong l do axit mnh HCl va to ra phn ng ngc tr li 278. Ha tan ht hn hp A gm x mol Fe v y mol Ag bng dung dch hn hp HNO3 v H2SO4, c 0,062 mol kh NO v 0,047 mol SO2 thot ra. em c cn dung dch sau phn ng th thu c 22,164 gam hn hp cc mui khan. Tr s ca x v y l: a) x = 0,08; y = 0,03 b) x = 0,07; y = 0,02 c) x = 0,09; y = 0,01 d) x = 0,12; y = 0,02 (Fe = 56; Ag = 108; N = 14; S = 32; O = 16) 279. Th t tr s pH gim dn ca cc dung dch sau y c cng nng mol/lt: KCl; NH4Cl; KOH; HCl; K2CO3; Ba(OH)2; H2SO4 l:

a) Ba(OH)2 > KOH > KCl > K2CO3 > NH4Cl > HCl > H2SO4 b) .Ba(OH)2 > KOH > K2CO3 > KCl > NH4Cl > HCl > H2SO4 c) Ba(OH)2 > KOH > K2CO3 > NH4Cl > KCl > HCl > H2SO4 d) H2SO4 > HCl > NH4Cl > KCl > K2CO3 > KOH > Ba(OH)2 280. Nhng mt ming kim loi M vo 100 ml dung dch CuCl 2 1,2M. Kim loi ng to ra bm ht vo ming kim loi M. Sau khi kt thc phn ng, khi lng ming kim loi tng 0,96 gam. M l kim loi no? a) Al b) Fe c) Mg d) Ni (Cu = 64; Al = 27; Fe = 56; Mg = 24; Ni = 59) 281. Khi lng ring ca kim loi Canxi l 1,55 gam/ml. Th tch ca 1 mol Ca bng bao nhiu? a) 25,806 ml b) 34,720 ml b) 22,4 lt d) 25,806 lt (Ca = 40) 282. Thy ngn (Hg) l kim loi duy nht hin din dng lng iu kin thng. Hi thy ngn rt c. Thy ngn c khi lng phn t l 200,59, c khi lng ring bng 13,55 gam/ml. T khi ca thy ngn v t khi hi ca thy ngn c tr s l: a) u bng 6,9 b) u bng 13,55 c) 13,55 v 6,9 d) Tt c u sai 283. Khi lng ring ca kh ozon 27,3C; 106,4 cmHg bng bao nhiu? a) 1,818 g/ml b) 2,727 g/ml c) 3,562 g/l d) 2,727g/l (O = 16) 284. Phn ng no sau y khng xy ra? a) FeS2 + 2HCl FeCl2 + S + H2S b) FeS2 + 18HNO3 Fe(NO3)3 + 2H2SO4 + 15NO2 + 7H2O c) 2FeI2 + I2 2FeI3 d) 2FeCl2 + Cl2 2FeCl3 285. Th tch dung dch H2SO4 98% c khi lng ring 1,84 g/ml cn ly pha thnh 350 ml dung dch H2SO4 37% c khi ring 1,28 g/ml l: a) 91,9 ml b) 85,3 ml c) 112,5 ml d) Mt tr s khc 286. Cho 28 gam Fe ha tan trong 256 ml dung dch H2SO4 14% (c khi lng ring 1,095g/ml), c kh hiro thot ra. Sau khi kt thc phn ng, em c cn dung dch th thu c m gam mt tinh th mui ngm 7 phn t nc (nmui : nnc = 1 : 7). Tr s ca m l: a) 139 gam b) 70,13 gam c) 116,8 gam d) 111,2 gam

(Fe = 56; S = 32; O = 16; H = 1) 287. Nhng mt ming kim loi M vo dung dch CuSO4, sau mt lc em cn li, thy ming loi c khi lng ln hn so vi trc khi phn ng. Cho bit kim loi b y ra khi mui bm ht vo ming kim loi cn d. M khng th l: a) Fe b) Zn c) Ni d) Al (Fe = 56; Zn = 65; Ni = 59; Al = 27; Cu = 65) 288. Dung dch A l dung dch HNO3. Dung dch B l dung dch NaOH. Cho bit 10 ml dung dch A tc dng vi 12 ml dung dch B, thu c dung dch ch gm NaNO3 v H2O. Nu trn 15,5 ml dung dch A vi 17 ml dung dch B, thu c dung dch D. Cc cht c trong dung dch D l: a) NaNO3; H2O b) NaNO3; NaOH; H2O c) NaNO3; HNO3; H2O d) C th gm NaNO3; H2O; c HNO3 ln NaOH v mui b thy phn (c phn ng ngc li) 289. Xem cc dung dch: KHSO4, KHCO3, KHS. Chn cch gii thch ng vi thc nghim: a. Mui KHSO4 l mui c to bi axit mnh (H2SO4) v baz mnh (KOH) nn mui ny khng b thy phn, do dung dch mui ny trung tnh, pH dung dch bng 7 b. Cc mui KHCO3, KHS trong dung dch phn ly hon to ion K+, HCOcng nh K+, HS-. K+ xut pht t baz mnh (KOH) nn l cht trung tnh. Cn HCO3-, HS- l cc cht lng tnh (v chng cho c H + ln nhn c H+, nn va l axit va l baz theo nh ngha ca Bronsted). Do cc dung dch loi ny (KHCO3, KHS) trung tnh, pH dung dch bng 7 c. (a), (b) d. Tt c u sai v tri vi thc nghim 290. Kh nit ioxit (NO2) l mt kh mu nu, c mi hc, rt c, n c coi l oxit axit ca hai axit, HNO3 (axit nitric) v HNO2 (axit nitr). Kh NO2 tc dng vi dung dch kim to hai mui (nitrat, nitrit) v nc. Cho 2,24 lt NO2 (ktc) tc dng hon ton vi 100 ml dung dch KOH 1M, thu c dung dch D. Chn kt lun ng v pH dung dch D: a) pH = 7, v c phn ng va b) pH < 7 v c NO2 d, n phn ng tip vi H2O to HNO3 c) pH > 7 v c KOH d d) pH > 7 291. S oxi ha ca S trong cc cht v ion: K2S, FeS2, S, S8, Na2S2O3, S4O62-, SO2, SO42- ln lt l:

a. -2; -1; 0; 0; +2; +2,5; +4; +6 b. -2; -2; 0; 0; +4; +5; +4; +6 c. -2; -2; 0; 0; +2; +3; +4; +6 d. -2; -1; 0; 0; +2; +3; +4; +8 292. Cho mt thanh kim loi M vo dung dch Cu(NO3)2. Sau khi ly thanh kim loi ra khi dung dch (c kim loi Cu bm vo). Cn li dung dch thy khi lng dung dch tng so vi trc khi phn ng. M khng th l: a) Pb b) Fe c) Zn d) (a), (c) (Cu = 64; Pb = 207; Fe = 56; Zn = 65) 293. X l mt nguyn t ha hc. Ion X2+ c s khi bng 55, s ht khng mang in tch ca ion ny nhiu hn s ht mang in tch m l 7 ht. Chn ng: a. Cu hnh electron ca ion ny l: 1s22s23s23p63d5 b. S hiu (S th t) nguyn t ca X2+ l Z = 23 c. X l mt phi kim d. Tt c u sai 294. Phn ng no khng xy ra? a) CuO + H2 Cu + H2O b) MgO + H2 Mg + H2O c) 3MnO2 + 4Al 3Mn + 2Al2O3 d) Cu + 2Fe(NO3)3 Cu(NO3)2 + 2Fe(NO3)2 295. X l mt nguyn t ha hc. Axit c cha X l H nXO3 (n l s nguyn t nhin). Phn trm khi lng ca X trong mui Kali ca axit ny l 18,182%. X l nguyn t no? a) C b) S c) Si d) Mt nguyn t khc (H = 1; O = 16; C = 12; S = 32; Si = 28; P = 31; Cl = 35,5; Sn = 118; Pb = 207;...) 296. Trn 120 ml dung dch HCl 5,4% (c khi lng ring 1,025 g/ml) vi 100 ml dung dch NaOH 6,47% (c khi lng ring 1,07 g/ml), thu c 220 ml dung dch D. Tr s pH ca dung dch D l: a) 1,39 b) 2,05 c) 8,12 d) 7 297. Mt hp cht c mu xanh lc to ra khi t Crom kim loi trong Oxi. Phn trm khi lng ca Crom trong hp cht ny l 68,421% . Cng thc ca hp cht ny l: a) CrO b) Cr2O3 c) CrO3 d) CrO2 (Cr = 52; O = 16) 298. LD50 c ngha l liu thuc gii hn khin mt na (50%) s con vt th nghim b cht. Liu LD50 etanol qua ng ming (ung) ca chut l

0,013ml/g (s ml etanol trn th trng tnh bng gam ca chut) . Gi s khng c s khc bit LD50 v etanol gia chut v ngi, th LD50 ca mt ngi cn nng 60kg bng bao nhiu? a) 0,78 ml b) 780 gam c) 78 ml d) 0,78 lt 299. Cht khong olomit (dolomite) gm CaCO3.MgCO3. Tuy nhin trong mt s trng hp, t l s mol gia CaCO3 vi MgCO3 khc 1 : 1. C mt mu olomit coi l hn hp gm CaCO3 v MgCO3. em nung 20,008 gam mt mu olomit ny cho n khi lng khng i th cn li 11,12 gam cht rn. Phn trm khi lng ca CaCO3 trong mu olomit trn l: a) 54,35% b) 52% c) 94,96% d) 80,5% (Ca = 40; Mg = 24; C = 12; O = 16) 300. Ure (H2N-CO-NH2) cng nh amoni nitrat (NH4NO3) u cung cp m (N) cho cy. Gi s gi tin 1kg phn ure l 5 000 ng , cn 1 kg phn NH4NO3 l 4 500 ng th loi phn no cung cp N r hn? a) NH4NO3 .b) Ure c) Gi c tng ng d) Hai loi N ny khc nhau nn khng so snh c (N = 14; H = 1; C = 14; O = 16) 301. Tng qut mt nguyn t ha hc hin din trong t nhin gm mt s nguyn t ng v vi t l xc nh. Do khi lng nguyn t c dng tnh ton l khi lng nguyn t trung bnh ca cc nguyn t ng v ca nguyn t trong t nhin vi t l xc nh. 28 Silic trong t nhin c ba ng v: ng v 14 Si c khi lng nguyn tSi c khi lng 30 nguyn t 28,97649 vC, chim 4,67% s nguyn t. ng v 14 Si c khi lng nguyn t 29,97376 vC, chim 3,10% s nguyn t. Khi lng nguyn t ca Si l bao nhiu? a) 28,0855 b) 28,0000 c) 27,9245 d) 28,01498 302. Hn hp A gm Fe v ba oxit ca n. Ha tan ht m gam hn hp A bng dung dch HNO3 long, c 672 ml NO thot ra (ktc) v dung dch D. em c cn dung dch D, thu c 50,82 gam mt mui khan. Tr s ca m l: a) 16,08 gam b) 11,76 gam c) 18,90 gam d) 15,12 gam (Fe = 56; O = 16; N = 14) 303. Mt lng bt kim loi st khng bo qun tt b oxi ha to cc oxit. Hn hp A gm bt st b oxi ha gm Fe, FeO, Fe3O4 v Fe2O3. ti to st, ngi ta dng hiro kh nhit cao. kh ht 15,84

27,97693 vC, chim 92,23% s nguyn t. ng v

29 14

gam hn hp A nhm to kim loi st th cn dng 0,22 mol H2. Nu cho 15,84 gam hn hp A ha tan ht trong dung dch H2SO4 m c, nng, th s thu c bao nhiu th tch kh SO2 iu kin tiu chun? a) 3,36 lt b) 2,464 lt c) 2,912 lt d) 1,792 lt (Fe = 56; O = 16) 1 2 3 304. Hiro c 3 nguyn t ng v l 1 H , 1 H , 1 H . Cn oxi c 3 nguyn t 16 17 18 ng v l 8 O , 8 O , 8 O . C th c ti a bao nhiu phn t nc khc nhau to thnh t cc nguyn t trn? a. 18 b. 12 c. 9 c. 6 1 2 3 305. Hiro c 3 nguyn t ng v l 1 H , 1 H , 1 H . Cn clo c 2 nguyn t 37 35 ng v l 17 Cl , 17 Cl . Phn trm khi lng ca clo trong phn t hiroclorua c to bi t cc ng v nng nht l (coi khi lng nguyn t bng s khi): a. 97,26% b. 97,22% c. 97,37% d. 92,50% 37 35 306. Nguyn t ho hc clo c 2 ng v 17 Cl , 17 Cl . Khi lng nguyn t clodng tnh ton (Cl = 35,5) l khi lng nguyn t trung bnh ca hai nguyn t ng v ca clo trn, hin din trong t nhin vi t l xc nh. Coi khi lng mi nguyn t ng v bng vi s khi A ca n. Phn trm s nguyn t mi ng v ca clo trong t nhin l: a) 80%; 20% b) 75%; 25% c) 70%; 30% d) 65%; 35% 307. T dung dch NaOH 40%, c khi lng ring 1,43 g/ml, mun pha thnh dung dch NaOH 2M th phi pha long bao nhiu ln? a) 7,15 ln b) 8,50 ln c) 6,32 ln d) 9,4 ln (Na = 23; O = 16; H = 1) 308. pha dung dch cht ch th mu phenolptalein, ngi ta cn 0,1 gam phenolptalein v ha tan trong 100ml etanol. Phenolptalein c vng pH i mu t 8,2 n 9,8. Vi dung dch c pH < 8,2 th phenolptalein khng c mu. Vi dung dch c pH > 9,8 th phenolptalein c mu tm sen. Cn dung dch c pH trong khong 8,2 9,8 th phenolptalein c mu trung gian gia khng mu v mu tm sen nn c mu tm sen rt nht. em trn 100ml dung dch HNO3 0,05M vi 600ml dung dch Ca(OH)2 c pH= 12, khuy u phn ng xy ra hon ton, thu c 700ml dung dch D. Thm vo dung dch D vi git dung dch phenolptalein th mu ca dung dch s nh th no? a) S c mu tm sen rt nht, v pH dung dch D nm trong khong 8,2 9,8

b) S khng c mu, v pH dung dch D < 8,2 c) S c mu tm sen, v pH dung dch D > 9,8 d) S khng c mu, v c s trung ha va , pH dung dch D = 7 2+ 309. Mangan (Mn) c Z = 25. Cu hnh in t ca ion Mn l 2 2 6 2 6 5 2+ 1s 2s 2p 3s 3p 3d . Ngi ta cho rng ion Mn bn v c cu hnh in 5 t 3d bn bo ha (3d , phn lp d cha 5 in t bng mt na ca d bo 10 ha in t, d ). Do cc hp cht c s oxi ha cao ca Mn nh KMnO4 (Mn c s oxi ha bng +7), K2MnO4 (Mn c s oxi ha +6), MnO2 (Mn c s oxi ha +4) d tham gia phn ng (nht l trong mi trng axit) 2+ to mui Mn . Chn cch ni ng: 2+ a) Cc hp cht KMnO4, K2MnO4, MnO2 d b oxi ha to mui Mn b) Cc hp cht KMnO4, K2MnO4, MnO2 khng bn, trong mi trng + 2+ axit (H ), chng rt d b oxi ha to thnh mui Mangan (II) (Mn ) 2+ c) Cc hp cht KMnO4, K2MnO4, MnO2 d b kh to mui Mn 2+ d) Ion Mn bn ngha l n tn ti lu di, nn cc phn ng ca Mn 2+ cng nh hp cht ca Mn khi phn ng u to ra hp cht Mn 310. Ly mt cc ng 34,16 gam hn hp bt kim loi ng v mui Fe(NO3)3 rn khan. lng nc d vo cc v khuy u hi lu, cc phn ng xy ra n cng (nu c). Nhn thy trong cc cn 1,28 gam cht rn khng b ha tan. Chn kt lun ng: a) Trong 34,16 gam hn hp lc u c 1,28 gam Cu v 32,88 gam Fe(NO3)3 b) Trong hn hp u c cha 14,99% Cu v 85,01% Fe(NO3)3 theo khi lng c) Trong hn hp u c cha 12,85% Cu v 87,15% khi lng Fe(NO3)3 d) Tt c u khng ph hp vi d kin cho. (Cu = 64; Fe = 56; N = 14; O = 16) 311. Trong cng nghip, ngi ta iu ch kim loi nhm bng cch in phn nng chy Al2O3, ngi ta c dng thm cht criolit (NaAlF6, hay AlF3.3NaF). Mc ch ca vic dng thm cht criolit l: a) Lm h nhit nng chy ca Al2O3 (t khong 2050C xung cn khong 950C, lm gim gi thnh sn xut rt ln)

b) To s dn in tt (do hin din ion nhiu hn, lm gim in tr, tng cng dng in) c) To hn hp Al2O3 criolit nh hn Al lng nng chy, hn hp ny ni bn trn to lp mng bo v Al lng va to ra khng b khng kh oxi ha d) C (a), (b) v (c) 312. Ha tan 2,216 gam hn hp A gm Na v Al trong nc, phn ng kt thc, thu c dung dch B v c 1,792 lt kh H2 to ra (ktc), cn li phn rn c khi lng m gam. Tr s ca m l: a) 0,216 gam b) 1,296 gam c) 0,189 gam d) 1,89 gam (Na = 23; Al = 27) 313. Chn pht biu ng v ng v: a) ng v l hin tng cc nguyn t ca cng mt nguyn t ha hc, nhng c khi lng khc nhau b) ng v l hin tng cc nguyn t ca cng mt nguyn t ha hc, c cng s hiu nguyn t Z (s th t nguyn t), nn nm cng mt v tr (cng mt ) trong bng h thng tun hon c) ng v l hin tng cc nguyn t c cng s proton, nhng khc nhau s ntron d) (a), (c) 314. Nng mol/l ca dung dch KOH 33%, c khi lng ring 1,32 g/ml, l bao nhiu? a) 6,78M b) 7,78M c) 5,92M d) 8,50M (K = 56; O = 16; H = 1) 315. T dung dch NH3 24%, c t khi 0,91, mun pha thnh dung dch NH3 2M, th thc hin nh th no? a) Ly mt th tch dung dch NH3 24% thm nc ct cho n 5 th tch dung dch sau cng b) Ly 1 lt dung dch NH3 24% thm nc ct vo cho 7,56 lt dung dch sau cng c) Ly 100 ml dung dch NH3 24% thm nc ct vo cho 642 ml dung dch d) Ly 100 ml dung dch NH3 24% thm nc ct vo cho 525 ml dung dch (N = 14; H = 1) 316. Kim loi nhm cng nh km, trong mi trng kim, kh c mui nitrt, nitrat to kh amoniac, cn nhm, km b oxi ha to mui aluminat cng nh zincat.

Ha tan 9,45 gam Al v 12,12 gam KNO3 trong dung dch KOH d, sau khi kt thc phn ng, c hai kh to ra. Phn trm th tch NH3 trong hn hp kh to ra l: a) 72,73% b) 67,32% c) 80% d) 75,25% (Al = 27; K = 39; N = 14; O = 16) 317. Dung dch axit photphoric 3M, c khi lng ring 1,15 g/ml, c nng phn trm khi lng bng bao nhiu? a) Khong 20% b) Khong 25,5% c) Khong 30,2% d) Khong 12% (H = 1; P = 31; O = 16) 318. Hn hp A gm hai mui FeCO3 v FeS2 c t l s mol 1 : 1. em nung hn hp A trong bnh c th tch khng i, th tch cc cht rn khng ng k, ng khng kh d (ch gm N2 v O2) cc mui trn b oxi ha ht to oxit st c ha tr cao nht (Fe2O3). ngui bnh, a nhit bnh v bng lc u (trc khi nung), p sut trong bnh s nh th no? a) S tng ln b) S gim xung c) Khng i d) Khng khng nh c 319. Cho lung kh H2 d qua ng s ng hn hp bt rn gm cc cht CuO, CaO, Fe2O3 v Al2O3 nung nng hiro kh hon ton oxit kim loi to kim loi nhng oxit no m n kh c. Cc cht rn sau phn ng gm cc cht no? a) Cu, Ca, Fe, Al b) Cu, Fe, CaO, Al2O3, CuO, Fe2O3 c) Cu, Ca, Fe, Al2O3 d) Cu, Fe, CaO, Al2O3 320. Cho 26,88 gam bt kim loi ng ha tan trong dung dch HNO3 long, ng trong mt cc. Sau khi kt thc phn ng, c 4,48 lt kh NO (ktc) thot ra v cn li m gam cht khng tan. Thm tip t t V ml dung HCl 3,2M vo cc ha tan va ht m gam cht khng tan, c kh NO thot ra. Tr s ca V l: a) 100ml b) 200 ml c) 50 ml d) 150 ml (Cu = 64) 321. Cho 200 ml dung dch HNO3 c pH = 1 vo 300 ml dung dch Ba(OH)2 c pH = 13, thu c 500 ml dung dch A. pH dung dch A bng bao nhiu? a) 7,00 b) 12,30 c) 5,70 d) 13,56 322. Oleum l axit sunfuric nguyn cht c ha tan SO3, n c cng thc H2SO4.nSO3. Khi lng oleum H2SO4.3SO3 cn cho vo 500 gam dung dch H2SO4 70% thu c dung dch H2SO4 98% l: a) 568,2 gam b) 642,3 gam c) 778,8 gam d) 892,9 gam

(S = 32; O = 16; H = 1) 323. Chn kh d ha lng hn trong ba cp kh: 1. O2 v N2 2. CO2 v SO2 3. NH3 v NF3 a) N2; CO2; NH3 b) O2; SO2; NF3 c) O2; SO2; NH3 d) O2; CO2; NH3 (O = 16; N = 14; C = 12; S = 32; H = 1; F = 19) 324. Dng mt ci ca nc mc nc ra khi mt lu nc d dng, trong khi phi cn in phn nc mi thu c cc kh hiro, oxi cc in cc. iu ny chng t: a) Lin kt hiro gia cc phn t nc rt bn chc b) Lin kt cng ha tr gia O v H trong phn t nc rt yu c) Tng tc ht Van der Waals gia cc phn t nc va phn cc rt ln, va c lin kt hiro lin phn t nn s to kh hiro v oxi t phn t nc rt kh khn. d) Lin kt hiro cng nh lc tng tc Van der Waals gia cc phn t nc yu hn nhiu so vi lin kt cng ha tr gia O v H trong phn t nc. 2+ 8 325. Cho bit ion M c in t phn lp ngoi cng l 3d . Chn pht biu ng: 2+ a) in tch ht nhn ca nguyn t M l 28 v ca ion M l 26 b) in 2+ tch ht nhn ca nguyn t M l 30 v ca ion M l 28 2+ c) in tich ht nhn ca nguyn t M v ca ion M bng nhau v bng 28 2+ d) in tch ht nhn ca nguyn t M v ca ion M bng nhau v bng 26 326. Chn nguyn t hoc ion c bn knh nh hn trong ba cp cht sau y: + 2+ 3+ + 1. Ne hoc Na 2. Mg hoc Al 3. Ar hoc K + 3+ + 2+ a) Na ; Al ; K b) Ne; Mg ; Ar 2+ + + 3+ c) Ne; Mg ; K d) Na ; Al ; Ar Cho bit: Nguyn t Ne Na Mg Al Ar K Z 10 11 12 13 18 19 327. Cht no va c tnh oxi ha va c tnh kh? + a) H .b) H2 c) Fe d) Cl

328. Cc dung dch mui: NH4Cl; KHCO3; Ba(NO3)2; KHSO4; NaAlO2 c mi trng ln lt l: a) Axit; Baz; Trung tnh; Axit; Baz b) Axit; Baz; Trung tnh; Trung tnh; Baz c) Axit; Axit; Trung tnh; Axit; Baz d) Axit; Baz; Baz; Axit; Baz 329. Nguyn tc chung iu ch kim loi l: a) Dng Al, H2, CO, C kh oxit kim loi nhit cao to kim loi b) Dng kim loi mnh y kim loi yu hn ra khi dung dch mui c) in phn nng chy mui clorua hay hiroxit kim loi iu ch kim loi kim, kim th d) Dng cht kh thch hp hn hay dng in kh hp cht ca kim loi nhm to kim loi tng ng 330. Ly hai chn nung c khi lng bng nhau, t hai chn trn hai a cn (cn cn bng). Cho vo chn ny mt lng bt CaCO3 (cn b lch), cho t t vo chn bn kia NaHCO3 cho n khi cn tr li cn bng. Ly hai chn ng ha cht em nung cho n khi lng khng i. Nu t hai chn sau khi nung (c ha cht cn li sau khi nung) ln hai a cn th s c hin tng g? a) Cn vn cn bng nh c v lng kh hay hi thot ra bng nhau b) Cn b lch v pha chn lc u ng CaCO3 c) Cn b lch v pha chn ng NaHCO3 lc u d) Khng th kt lun c v khng c s liu c th (Ca = 40; C = 12; O = 16; Na = 23, H = 1) 331. Ha tan 1,59 gam hn hp A gm kim loi M v Al trong lng nc d. Khuy u phn ng xy ra hon ton, c 0,04 mol kh hiro thot ra, cn li 0,27 gam cht rn khng tan. M l kim loi no? a) Na b) K c) Ca d) Ba (Al = 27; Na = 23; K = 39; Ca = 40; Ba = 137) 332. Dung dch cha cht tan A (A c khi lng phn t l M) c nng 3 phn trm khi lng l C. Dung dch ny c khi lng ring l D (g/cm ). Nng mol/lt ca dung dch ny l: 10CD CD CD a. b. c. d. Mt kt qukhc M M 100 M 333. Mt dung dch cha cht tan X (X c khi lng mol l M gam) c nng mol/l l C. Dung dch ny c t khi l d. Nng phn trm khi lng ca dung dch l:

10MC MC MC b. c. d. Mt kt qukhc d 10d d 334. Dung dch cha cht tan Y c nng phn trm khi lng l C (C%). Y c khi lng phn t l M (vC, u). Dung dch ny c khi lng ring l D (g/ml). S mol Y c trong V (lt) dung dch ny l: VCD 100VCD 10VCD a. b. c. d. Mt kt qu khc 100 M M M 3+ 335. Mt dung dch c cha cc ion: x mol Fe ; y mol Cl ; 0,03 mol SO42- v 0,05 mol Mg2+. em c cn dung dch, thu c 8,75 gam hn hp cc cht rn khan. Tr s ca x, y l: a) x = 0,1; y = 0,02 b) x = y = 0,03 c) x = 0,15; y = 0,01 d) x = 0,02; y = 0,1 (Fe = 56; Mg = 24; Cl = 35,5; S = 32; O = 16) 336. Hn hp A gm Fe v FeS. Cho 2,32 gam hn hp A tc dng ht vi dung dch H2SO4 long c d, c hn hp hai kh thot ra. Dn hn hp kh qua dung dch CuCl2 d, thu c mt cht khng tan c mu en c khi lng 1,92 gam. S mol mi cht c 2,32 gam hn hp A l: a) 0,01 mol; 0,02 mol b) 0,015 mol; 0,03 mol c) 0,02 mol; 0,03 mol d) 0,01 mol; 0,03 mol (Fe = 56; S = 32; Cu = 64) 3+ 2+ 337. Xem cc cht, ion: Fe, Fe , Cl2, Cl , HCl, S, S , SO2, H2S, H , CuO, Sn . Cht hay ion no khng th b kh? 3+ 2- + a) Fe, Cl2, HCl, H2S, S, Sn b) Fe , S , H , CuO, SO2 2- 2c) Fe, Cl , HCl, S , H2S, Sn d) Fe, Cl , S , Sn 338. Ha tan ht m gam hn hp A gm Al v FexOy bng dung dch HNO3, thu c phn kh gm 0,05 mol NO v 0,03 mol N2O, phn lng l dung dch D. C cn dung dch D, thu c 37,95 gam hn hp mui khan. Nu ha tan lng mui ny trong dung dch xt d th thu c 6,42 gam kt ta mu nu . Tr s ca m v FexOy l: a) m = 7,29gam; FeO b) m = 9,72gam; Fe3O4 c) m = 9,72 gam; Fe2O3 d) m = 7,29 gam; Fe3O4 (Al = 27; Fe = 56; O = 16; N = 14; H = 1) 339. Vi phng php nhit luyn, iu ch c kim loi no bng cch cho CO kh oxit kim loi tng ng trong cc kim loi sau nhit cao: Cu, Mn, Al, Fe, Mg, Zn, K, Pb, Cr, Ca?

a.

a. Tt c cc kim loi trn b. Cu, Fe, Zn, Pb c. Cu, Mn, Fe, Zn, Pb, Cr, Ca d. Cu, Mn, Fe, Zn, Pb, Cr 340. Vi phn ng: NaCl + KMnO4 + H2SO4 ...... Qu trnh kh ca phn ng trn s to ra cht no? b. SO2 c. MnSO4 a. Cl2 d. Khng c cht no c, v phn ng trn khng xy ra 341. Qu trnh oxi ha l: a. Qu trnh to ra cht oxi ha tng ng t cht kh b. Qu trnh trong cht kh b oxi ha c. Qu trnh cho in t d. C (a), (b), (c) 342. S oxiho ca N trong nitro benzen C6H5-NO2 v anilin C6H5-NH2 ln lt l: a) +4; -2 b) +3; -3 c) +5; -1 d) +2; -3 343. S oxi ha ca Fe v S trong FeS2 ln lt l: a) +3; -1,5 b) +2; -2 .c) +2; -1 d) +3; -2 344. S oxi ha ca N trong amoni nitrat (NH4NO3) l: a) +5 b) -3 c) -4; +6 d) -3; +5 345. S oxi ha ca C trong benzen ( ) l: a) -1 b) +1 c) -4 d) 0 346. S oxi ha ca C trong phn t axit axetic (CH3COOH) l: a) -3; +4 b) -3; +2 c) -3; +3 d) -4 347. S oxi ha ca C trong propan (CH3CH2CH3) l: a) -3; 0; -3 b) +3; +2; +3 c) +3; -2; +3 d) -8/3 348. S oxi ha ca nguyn t C lin kt vi nhm OH trong phn t axit

picric (hay 2,4,6-trinitrophenol) l: a) +1 b) -1 c) 0

d) -4

349. Nguyn t C trong phn t Canxi cacbua (CaC2) c: a) Ha tr 4; S oxi ha -4 b) Ha tr 4; S oxi ha -1 c) Ha tr 4; S oxi ha +4 d) Ha tr 1; S oxi ha -1 350. Nguyn t C trong Nhm cacbua (Al4C3) c: a) Ha tr 4; S oxi ha -4 b) Ha tr 4: S oxi ha -1 c) Ha tr 4; S oxi ha +4 d) Ha tr 3; S oxi ha -3

351. ng trong mui kp FeCu2S3 c ha tr: a) 1 b) 2 c) C th ha tr 1 hoc ha tr 2 d) 3/2 352. Nguyn t Oxi trong phn t nc (H2O) c: a) Ha tr 2; S oxi ha +2 b) Ha tr 2; S oxi ha -2 c) Ha tr -2; S oxi ha -2 d) Ha tr 2; S oxi ha -1 353. Nguyn t Oxi trong phn t Hiro peoxit (H2O2) c: a) Ha tr 2; S oxi ha -2 b) Ha tr 1; S oxi ha -2 c) Ha tr 1; S oxi ha -1 d) Ha tr 2; S oxi ha -1 354. St trong st t oxit (Fe3O4) c: a) C ha tr 2; S oxi ha +8/3 b) C ha tr 3; S oxi ha +8/3 c) C ha tr 2, ha tr 3; S oxi ha +2; +3 d) Ha tr 8/3; S oxi ha +8/3 355. Vi phn ng: 2Na2S2O3 + I2 Na2S4O6 + 2NaI th Na2S2O3 c vai tr: a) Mt cht oxi ha b) Mt cht b kh c) Mt cht trao i d) Mt cht b oxi ha 356. Trong mt phn ng reforming, ngi ta bin Xiclohexan ( )

361. Ru bc nht tc dng ng (II) oxit, un nng, thu c anehit R-CH2OH + CuO R-CHO + Cu Chn cch ni chnh xc: a) Ru bc nht b kh to anehit b) ng (II) oxit kh ru bc nht c) Ru bc 1 b oxi ha bi CuO d) Ru bc 1 oxi ha CuO to ng kim loi 362. Mt trong cc tnh cht ha hc c trng ca anehit l n cho c phn ng trng gng (trng bc): R-CHO + 2AgNO3 + 3NH3 RCOONH4 + 2Ag + 2NH4NO3 a) Anehit oxi ha mui bc trong amoniac b) Anehit kh mui bc c) Mui bc kh anehit d) Mui bc b oxi ha 363. Ha tr v s oxi ha ca Cl trong axit cloric (HClO3) l: a) 7; +5 b) 7; +7 c) 5; +5 d)5; -5 364. S oxi ha ca mi nguyn t C trong phn t vinylaxetilen (CH2=CHCCH) l: thnh benzen ( ), th Xiclohexan ng vai tr: a) -2; -1; -1; -1 b) -2; -1; 0; -1 c) +2; +1; 0; +1 d) -2; -1; +1; -1 a) Va l cht kh, va l cht oxi ha b) Cht kh 365. Xt cc cp cht di y trong dung dch, cp cht c th xy ra phn c) Cht oxi ha d) Khng l cht kh, cng khng l cht oxi ha 357. Trong phn ng iu ch anilin (C 6 H 5 -N H 2 ) bng cch cho ng? 3+ 3+ nitrobenzen ( C 6 H 5 -NO 2 ) tc dng vi nguyn t hiro mi sinh, th Fe + Fe2+ (1) Fe + Fe (2) Ag + Fe (3) nitrobenzen c vai tr: 3+ + 2 (4) Ag + Fe (5) a) Mt cht kh b) Mt cht oxi ha c) Mt cht Cu + Fe a) C 5 cp cht trn b) (2), (3), (4), (5) c) (2), (3), (4) d) (2), (4), (5) b oxi ha d) Mt cht trao i + 2+ 358. mt in cc ca mt pin in ha hc xy ra qu trnh nh sau: 366. Phn ng gia Ag vi Fe xy ra c trong dung dch l do: - 2+ Zn . y l 2+ 3+ Zn - 2e a. Tnh oxi ha ca Fe mnh hn tnh oxi ha ca Fe v tnh kh ca a) Mt phn ng oxi ha kh b) Mt qu trnh kh + Ag mnh hn tnh kh ca Ag c) Mt qu trnh oxi ha d) Mt qu trnh trao i in t + 2+ 359. Phn ng nh hp axetilen to vinyaxetilen b. Tnh oxi ha ca Ag mnh hn tnh oxi ha ca Fe v tnh kh ca 2+ Fe mnh hn tnh kh ca Ag 2+ + c. Tnh kh ca Fe mnh tnh kh ca Ag v tnh oxi ha ca Ag mnh a) y l mt phn ng cng b) y l mt phn ng trng hp 3+ c) y l mt phn ng oxi ha kh d) c (a), (b), (c) hn tnh oxi ha ca Fe 360. Cho bt kim loi st vo dung dch mui st (III) th thu c dung dch 2+ 3+ d. Tnh kh ca Ag mnh hn tnh kh ca Fe v tnh oxi ha ca Fe mui st (II)

+ mnh hn tnh oxi ha ca Ag 367. Cho bt km vo dung dch mui FeCl3 th s thu c: a) ZnCl2, FeCl3, Fe b) ZnCl2, FeCl2, Zn c) ZnCl2, FeCl2, FeCl3, Fe d) ZnCl2, Fe, Zn 368. Ha tan 0,784 gam bt st trong 100 ml dung dch AgNO3 0,3M. Khuy u phn ng xy ra hon ton, thu c 100 ml dung dch A. Nng mol/l cht tan trong dung dch A l: a) Fe(NO3)2 0,12M; Fe(NO3)3 0,02M b) Fe(NO3)3 0,1M c) Fe(NO3)2 0,14M d) Fe(NO3)2 0,14M; AgNO3 0,02M (Fe = 56) 369. Cho 19,5 gam bt kim loi km vo 250 ml dung dch Fe2(SO4)3 0,5M. Khuy u phn ng xy ra hon ton. Khi lng cht rn thu c sau phn ng l: a) 11,2 gam b) 9,8 gam c) 11,375 gam d) 8,4 gam (Zn = 65; Fe = 56) 370. Cho 2,688 gam bt kim loi ng ha tan trong 100 ml dung dch HNO3 0,8M, c to kh NO thot ra. Thy cn li bt kim loi ng, thm tip dung dch HCl vo ha tan ht lng bt ng ny, thy c V (ml) kh NO thot ra (ktc). Cc phn ng xy ra hon ton. Tr s ca V l: a. ng s khng b ha tan ht v HCl khng ha tan c kim loi Cu b. 627,2 ml c. 179,2 ml d. 291,2 ml (Cu = 64) 371. Qu trnh oxi ha l: a) Qu trnh to ra cht oxi ha b) Qu trnh cho in t c) Qu trnh lm tng s oxi ha d) (a), (b), (c) 372. Nguyn tc cn bng phn ng oxi ha kh l: a. S in t cho ca cht kh bng s in t nhn ca cht oxi ha b. S in t cho ca qu trnh kh bng s in t nhn ca qu trnh oxi ha c. S oxi ha tng ca cht oxi ha bng s oxi ha gim ca cht kh d. C ba trn 373. Vi phn ng: FeS2 + H2SO4(, nng) Fe2(SO4)3 + SO2 + H2O th khi ha tan ht 4 gam qung pirit cha 40% tp cht tr bng dung dch axit sunfuric m c nng s thu c bao nhiu th tch kh SO2 (ktc). Phn ng xy ra

hon ton. a) 2,24L b) 3,36L c) 2,464L d) 1,643L (Fe = 56; S = 32) 374. Kim loi ng b ha tan trong dung dch mui nitrat trong mi trng axit v c to kh NO. Cn dng bao nhiu th tch dung dch HCl 1M ha tan ht 1,92 gam Cu trong lng d mui nitrat? a) 20ml b) 40ml c) 60ml d) 80ml (Cu = 64) 375. Axit clohiric lm mt mu tm ca thuc tm theo phn ng: KMnO4 + HCl MnCl2 + Cl2 + KCl + H2O lm mt mu 2 mol KMnO4 th cn: a) 16 mol HCl ng vai tr cht kh b) 8 mol HCl va ng vai tr cht kh va ng vai tr mi trng axit c) 6 mol HCl va ng vai tr cht kh, 10 mol HCl ng vai tr mi trng axit d) 10 mol HCl ng vai cht kh, 6 mol HCl ng vai tr mi trng 376. St t oxit (Fe3O4) c coi nh gm FeO v Fe2O3 nn khi cho st t tc dng vi axit H3PO4 thu c hn hp mui st (II) photphat, st (III) photphat v nc: aFe3O4 + bH3PO4 cFe3(PO4)2 + dFePO4 + eH2O Tng cc h s (a + b + c + d + e) l: a) 30 b) 18,5 c) 37 d) Tt c u khng ph hp t0 377. VCi phn ng: FexOy + CO FemOn + CO2. H s ng trc cc cht kh l: a) m b) nx-my c) my-nx d) 2m 378. Vi phn ng: Al + HNO3 Al(NO3)3 + NO2 + N2O + H2O T l th tich cc kh thu c l VNO 2 : VNO : VN 2 O 1:2:3. H s nguyn ti gin ng trc cc cht oxi ha ca phn ng trn l: a) 31 b) 48 c) 120 d) 124 379. Ha tan ht 6,72 gam mt kim loi M trong dung dch HNO3 long, thu c 2,688 lt kh NO (ktc). M l kim loi no? a) Al b) Fe c) Cu d) Zn 380. S oxi ha ca mi nguyn t C trong phn t axit cloaxetic (ClCH2COOH) l: a) -3; +3 b) -2; +3 c) -1; +3 d) -1; +2 + 381. N trong ion NH4 c ha tr v s oxi ha l: a) 4; -3 b) 3; -3 c) 4; +1 d) 3; +1 382. Ozon c cu to mch h. Cng thc Lewis (mt loi cng thc cu

to c vit c cc in t lp ha tr, ngoi cng, ca tng nguyn t v in tch hnh thc, nu c, ca cc nguyn t trong phn t) ca ozon (O3) l

387. Vi phn ng: + 2+ + MnO4 + H CO2 + Mn + H2O + H s ng trc ion H cc h s ng trc cc cht ca phn ng trn l cc s nguyn nh nht l: a) 36 b) 72 c) 60 d) 80 388. Cho 2,236 gam hn hp A dng bt gm Fe v Fe3O4 ha tan hon ton trong 100ml dung dch HNO3 c nng C (mol/l), c 246,4 ml kh NO (ktc) thot ra. Sau phn ng cn li 0,448 gam kim loi. Tr s ca C l: .a) 0,68M b) 0,5M c) 0,4M d) 0,72M (Fe = 56; O = 16) 389. Phn ng: aFexOy + bHCl cFeCl2 + dFeCl3 + eH2O Tr s ca c, d ca phn ng l: a) c = 2y 2x; d = 3x 2y b) c = 3x 2y; d = 2y 2x c) c = 2x 2y; d = 2y 3x d) c = 2y 2x; d = 2x 2y 390. Dung dch CH3COOH 0,1M c in ly 1,3% 25C c ngha l: a. C 100 mol CH3COOH ha tan trong dung dch ny th c 1,3 mol CH3COOH phn ly thnh ion b. C 1000 phn t CH3COOH ha tan trong dung dch th c 13 phn t CH3COOH phn ly to ion c. C 1 mol CH3COOH ha trong dung dch th c 0,013 mol phn ly ion d. (a), (b) , (c) 391. Dung dch axit yu AH c nng C (mol/l) c in ly . Tr s pH ca dung dch ny l: a) log(C) b) log(C/100) c) log(100C) d) Tt c u sai 392. Dung dch CH3COOH 0,05M c in ly 1,9% 25C. Tr s pH ca dung dch ny l: a) 1,3 b) 1,02 c) 3,02 d) 5,02 393. Dung dch NH3 0,075M c in ly bng 1,5% 25C. Tr s pH ca dung dch NH3 0,075M 25C l: a) 11,05 b) 12,18 c) 12,86 d) 8,35 394. Ha tan ht m gam Al bng 250 ml dung dch HNO3 nng C (mol/l) va . Thu c 0,03 mol NO; 0,02 mol N2O v 0,01 mol N2. Tr s ca m v C l: C6H12O6

Ha tr v s oxi ha ca O trong phn t ozon l: a) 1, 3, 2; -1, +1, 0 b) -1, +1, 2; -1, +1, 0 c) 1, 3, 2; 0 d) 2; 0 383. Vi cc cp oxi ha kh sau y c sp theo th in ha chun tng 2+ 2+ 2+ 2+ 3+ 2+ + dn: Zn /Zn < Fe /Fe < Ni /Ni < Cu /Cu < Fe /Fe < Ag /Ag (-0,76V) (-0,44V) (-0,26V) (0,34V) (0,77V) (0,80V) Chn pht biu ng: 2+ 2+ 2+ 2+ 3+ + a) Tnh oxi ha gim dn: Zn , Fe , Ni , Cu , Fe , Ag 2+ b) Tnh kh tng dn: Zn, Fe, Ni, Cu, Fe , Ag + 3+ 2+ 2+ 2+ 2+ c) Tnh oxi ha tng dn: Ag , Fe , Cu , Ni , Fe , Zn 2+ 2+ 2+ 2+ 3+ + d) Tnh oxi ha tng dn: Zn , Fe , Ni , Cu , Fe , Ag 384. Phn ng: Cu + Fe2(SO4)3 CuSO4 + 2FeSO4 xy ra c trong dung dch l do: 3+ 2+ a. Tnh kh ca Cu mnh hn Fe v tnh oxi ha ca Fe mnh hn Cu 2+ 3+ 2+ b. Tnh oxi ha ca Cu mnh hn Fe v tnh kh ca Fe mnh hn Cu 2+ 3+ 2+ c. Tnh kh ca Cu mnh hn Fe v tnh oxi ha ca Fe mnh hn Cu 3+ 2+ 2+ d. Tnh oxi ha ca Fe mnh hn Fe v tnh kh ca Cu mnh hn Fe 385. Cho 5,608 gam hn hp A hai cht rn dng bt gm ng kim loi v mui Fe(NO3)3 vo mt cc thy tinh. Rt nc vo cc v khuy u phn ng xy ra hon ton. Sau phn ng, thy trong cc cn li 0,128 gam cht rn khng tan. Khi lng mi cht c trong 5,608 gam hn hp A l: a) 0,768g Cu; 4,84g Fe(NO3)3 b) 1,28g Cu; 4,328g Fe(NO3)3 c) 0,078g Cu; 5,53g Fe(NO3)3 d) 0,96g Cu; 4,648g Fe(NO3)3 (Cu = 64; Fe = 56; N = 14; O = 16) 386. M l mt kim loi. Ha tan ht 0,78 gam M bng dung dch H2SO4 m c nng, thu c 504 ml mt kh c mi xc (o ktc). Kim loi M l: a) Hg b) Mg c) Cr d) Zn (Hg = 200; Mg = 24; Cr = 52; Zn = 65)

a) m = 3,15 g; C = 1,76M c) m = 4,05 g; C = 2M

b) m = 3,24 g; C = 1,6M d) m = 5,4 g; C = 1,5M (Al = 27) 395. m gam bt kim loi st ngoi khng kh mt thi gian, thu c 2,792 gam hn hp A gm st kim loi v ba oxit ca n. Ha tan tan ht hn hp A bng dung dch HNO3 long, thu c mt mui st (III) duy nht v c to 380,8 ml kh NO duy nht thot ra (ktc). Tr s ca m l: a) 0,56gam b) 2,24 gam c) 2,8 gam d) 3,36 gam (Fe = 56; O = 16) 396. Vi phn ng: MxOy + HNO3 M(NO3)n + NO + H2O H s ng trc cht oxi ha bn tc cht l: a) 3 b) 2nx 4y c) 4nx 4y d) 4nx 2y -4 -5 -5 -10 397. Chn tr s Ka: 1,8.10 ; 1,8.10 ; 1,34.10 ; 1,3.10 cho cc cht: (A): Axit axetic (CH3COOH); (B): Axit Propionic (CH3CH2COOH); (C): Phenol (C6H5OH); (D): Axit fomic (HCOOH) -4 -5 -5 -10 a) (D): 1,8.10 ; (C): 1,8.10 ; (B): 1,34.10 ; (A): 1,3.10 -4 -5 -5 -10 b) (A): 1,8.10 ; (B): 1,8.10 ; (C): 1,34.10 ; (D): 1,3.10 -4 -5 -5 -10 c) (D): 1,8.10 ; (A): 1,8.10 ; (B): 1,34.10 ; (C): 1,3.10 -4 -5 -5 -10 d) (D): 1,8.10 ; (B): 1,8.10 ; (A): 1,34.10 ; (C): 1,3.10 398. Hn hp cc cht no di y cng tn ti trong dung dch? (I): K2SO4 MgCl2 Al(NO3)3 FeBr3 (II): NaCl CuSO4 NH4NO3 Pb(CH3COO)2 (III): CaCl2 (NH4)2SO4 Zn(NO3)2 AgNO3 (IV): MgSO4 NH4Cl NaOH KNO3 a) (I) b) (II) c) (III) d) (I), (IV) 399. Trng hp no cc ion cng hin din trong dung dch? + 2+ (I): 0,1 mol NH4 ; 0,2 mol Ca ; 0,2 mol NO3 ; 0,15 mol Cl ; 0,1 mol CH3COO(II): 0,15 mol Na+ ; 0,1 mol Mg2+ ; 0,15 mol Zn2+ ; 0,2 mol SO42- ; 0,25 mol Cl+ + 2+ (III): 0,1 mol K ; 0,2 mol Na ; 0,05 mol Ba ; 0,1 mol NO3 ; 0,1 mol 2SO4 ; 0,1 mol Cl + + 2+ (IV): 0,1 mol Na ; 0,1 mol NH4 ; 0,15 mol Ca ; 0,1 mol Br ; 0,2 mol

2CO3 a) (I), (II) b) (II) c) (III) d) (IV) 400. Trng hp no cc ha cht khng cng hin din trong dung dch? (I): NaOH Ba(OH)2 KNO3 ZnCl2 (II): Al2(SO4)3 Pb(NO3)2 NH4Cl CH3COONa (III): K2SO4 CuS NaNO3 NH4Cl (IV): Ca(NO3)2 NaCl CuBr2 Fe(CH3COO)2 K3PO4 (V): NH4NO3 K2SO4 MgCl2 Al(CH3COO)3 ZnBr2 a) (I), (III), (IV), (V) b) (II), (III), (IV), (V) c) (I), (II), (IV), (V) d) (I), (II), (III), (IV) 401. Ly m gam bt ng kim loi em ha tan ht trong dung dch axit nitric, c 896 ml kh NO2 v 448 ml kh NO thot ra (cc th tch kh o ktc). Tr s ca m l: a) 1,92 b) 2,56 c) 3,20 d) 3,84 (Cu = 64) 402. Dung dch HCl 0,01M c tr s pH l: a) 1 b) 2 c) 4 d) 5 403. Dung dch NaOH 0,1M c tr s pH l: a) 14 b) 13 c) 12 d) 11 404. Dung dch CH3COOH 0,1M c in ly (phn trm phn ly ion) = 1,3%, 25C, tr s pH ca dung dch ny 25C l: a) 1 b) 2 c) 2,5 d) 2,9 405. Dung dch CH3COOH 0,1M c in ly = 1,3% 25C. Tr s hng s phn ly ion axit Ka ca CH3COOH, 25C, l: -5 -4 -6 -4 a) 1,7.10 b) 1,7.10 c) 1,8.10 d) 1,75.10 406. em trn 50 ml dung dch H2SO4 1M vi 50 ml dung dch KOH 2,1M. Sau khi phn ng xong, thu c 100 ml dung dch A. tr s pH ca dung dch A l: a) 13,74 b) 13,50 c) 12,70 d) 12,30 407. Ha tan 0,74 gam Ca(OH)2 trong 100 ml dung dch HCl 0,21M. Sau khi kt thc phn ng, thu c 100 ml dung dch X. Tr s pH ca dung dch X l: a) 0,5 b) 1,0 c) 1,5 d) 2,0 (Ca = 40; O = 16; H = 1) 408. Dung dch NH3 0,1M c in ly = 1,3% 25C. Tr s pH ca dung

dch NH3 0,1M 25C l: a) 12,0 b) 11,6 c) 11,1 d) 13,5 409. Dung dch NH3 0,2M c pH = 11,28 25C. Tr s hng s phn ly ion Kb ca NH3 25C l: -4 -5 -6 -4 a) 1,7.10 b) 1,8.10 c) 1,8.10 d) 1,75.10 -5 410. Cho bit NH3 c Kb = 1,7.10 25C. Dung dch NH3 1M 25C c tr s pH l: a) 12,0 b) 11,1 .c) 11,6 d) 12,5 411. Cho 100 ml dung dch hn hp A gm HCl 1M H2SO4 0,6M tc dng vi 100 ml dung dch hn hp B gm NaOH 2M Ba(OH)2 0,12M. Sau khi phn ng xong thu c 200 ml dung dch C. Tr s pH ca dung dch C l: a) 6,3 b) 7,0 c) 13,7 d) 12,3 412. Qu trnh kh l: a) qu trnh nhn in t b) qu trnh lm gim s oxi ha c) qu trnh to ra cht kh d) (a), (b), (c) 413. Qu trnh oxi ha l: a) qu trnh cho in t b) qu trnh to ra cht kh t cht oxi ha tng ng c) qu trnh lm gim s oxi ha d) (a), (b), (c) 414. Phn ng: aFexOy + bH2SO4 cFeSO4 + dFe2(SO4)3 + eH2O Gi tr ca c, d l: a) c = 3x-2y; d = y-x b) c = x-y; d = 2y-3x c) c = y-2x; d = x-3y d) c = 2x-y; d = 3y-x 415. Phn ng: FexOy + bH2SO4 cFeSO4 + dFe2(SO4)3 + eH2O Chn pht biu ng nht: a) y l mt phn ng oxi ha kh b) y l mt phn ng trao i (khng l phn ng oxi ha kh) c) Phn ng ny ch ng khi FexOy l Fe3O4 d) y khng phi l phn ng oxi ha kh, ng vi mi oxit st 416. Phn ng oxi ha kh xy ra trong dung dch: a) Gia cht kh yu vi cht oxi ha yu to ra cht oxi ha v cht kh tng ng mnh hn b) Gia cht d cho in t vi cht d nhn in t

c) Gia cht kh mnh vi cht oxi ha yu d) Gia cht oxi ha mnh vi cht kh cho in t 417. Nguyn tc chung cn bng mt phn ng oxi ha kh l: a) S in t cho ca cht oxi ha bng s in t nhn ca cht kh b) S oxi ha tng ca cht oxi ha bng s oxi ha gim ca cht kh c) S in t cho ca qu trnh oxi ha bng s in t nhn ca qu trnh kh d) S oxi ha gim ca qu trnh oxi ha bng s oxi ha tng ca qu trnh kh 418. Nng mol/lt ca dung dch NH3 26%, c t khi 0,904, l: a) 13,8M b) 12,8M c) 10,4M d) 15,3M (N = 14; H = 1) 419. Mt hc sinh cn m gam tinh th CuSO4.5H2O nhm cho vo 100 gam dung dch CuSO4 2% thu c dung dch CuSO4 5%. Tr s ca m l: a) 4,34 gam b) 5,08 gam c) 5,75 gam d) 6,72 gam (Cu = 64; S = 32; O = 16; H = 1) 3 420. T dung dch H2SO4 62%, c khi lng ring 1,52 g/cm , mun pha 3 long thnh dung dch H2SO4 35%, c khi lng ring 1,26 g/cm , th cn phi pha long bao nhiu ln? a) 2,137 ln b) 3,250 ln c) 2,5 ln d) 1,771 ln + 2+ 421. Phn ng: aCu + bNO3 + cH dCu + eNO + fH2O Tng cc h s (a + b + c + d + e + f) l: a) 16 b) 18 c) 20 d) 22 422. Propan (C3H8) c t khi v khi lng ring iu kin tiu chun l: 3 a) 1,517; 1,517 g/cm b) 1,517; 1,517 g/l c) 1,517; 1,964 g/l d) 1,517; 1,964 g/ml (C = 12; H = 1) 423. Vi phn ng: CH2=CH-CHO + 2H2 CH3CH2CH2OH Chn pht biu ng a) y l mt phn ng cng, ng thi cng l mt phn ng oxi ha kh, trong acrolein b oxi ha to ru n-propylic b) y l mt phn ng oxi ha kh, trong hiro oxi ha acrolein c) y l mt phn ng cng nn l mt loi phn ng trao i d) y l mt phn ng oxi ha kh 424. Khi trn 40 ml dung dch HCl 0,2M vi 60 ml dung dch NaOH 0,1M, thu