kim tra nh k H v tn:
Mn: Ha v c (NC)
Cu 1: thu c dung dch HCl 25%. Ngi ta ly m1 gam dung dch HCl 45%
pha vi m2 dung dch HCl 15%. T l m1 :m2 cn l A. 1: 2 B. 1: 3 C. 2 :
1 D. 3 : 1 Cu 2: pha 500 ml dung dch nc mui sinh l (C= 0,9%), cn
Vml dd NaCl 3% . Gi thit rng t khi ca dung dch thay i khng ng k. Gi
tr ca V l A. 150 B. 214,3 C. 285,7 D. 350 Cu 3: Nguyn t khi trung
bnh ca brom l 79,319. Brom c hai ng v bn: v Thnh phn % s nguyn t ca
l: A. 84,05 B. 81,02 C. 18,98 D. 15,95 Cu 4: Mt hn hp gm O2, O3 iu
kin tiu chun c t khi i vi hiro l 18. Thnh phn % v th tch ca O3
trong hn hp l: A. 15% B. 25% C. 35% D. 45% Cu 5: Cn trn 2 th tch
metan vi mt th tch ng ng X ca metan thu c hn hp kh c t khi hi so vi
hiro bng 15. X l A. C3H8 B. C4H10 C. C5H12 D. C6H14 Cu 6: Thm 250
ml dung dch NaOH 2M vo 200 ml dung dch H3PO4 1,5M. Mui to thnh v
khi lng tng ng l: A. 14,2 gam Na2HPO4; 32,8 gam Na3PO4 B. 28,4 gam
Na2HPO4; 16,4 gam Na3PO4 C. 12,0 gam NaH2PO4; 28,4 gam Na2HPO4 D.
24,0 gam NaH2PO4; 14,2 gam Na2HPO4 Cu 7: Ha tan 3,164 gam hn hp 2
mui CaCO3 v BaCO3 bng dung dch HCl d, thu c 448 ml kh CO2 (ktc).
Thnh phn % s mol ca BaCO3 trong hn hp l: A. 50% B. 55% C. 60% D.
65% Cu 8: A l qung hematit cha 60% Fe2O3. B l qung manhetit cha
69,6% Fe3O4. Trn m1 tn qung A vi m2 tn qung B thu c qung C, m t 1
tn qung C c th iu ch c 0,5 tn gang cha 4% cacbon. T l m1/m2 l: A.
5/2 B. 4/3 C. 3/4 D. 2/5 Cu 9: Hn hp gm CO2 v N2 c t khi hi so vi
H2 l 18. Thnh phn % theo khi lng ca CO2 v N2 c trong hn hp l A. 50:
50 B. 38,89: 61,11 C. 20: 80 D. 45: 55 Cu 10: t chy hon ton hn hp X
gm 2 ancol no n chc, mch h k tip nhau trong dy ng ng th thy t l s
mol CO2 v s mol H2O sinh ra l 9: 13. Thnh phn % theo s mol ca mi
ancol theo th t mch C tng dn trong hn hp X l A. 40: 60 B. 75: 25 C.
25: 75 D. 45: 55 Cu 11: T khi ca hn hp C2H6 v C3H8 so vi H2 l 18,5.
Thnh phn % v th tch ca C3H8 trong hn hp l: A. 15% B. 50% C. 65% D.
75% Cu 12: Hn hp gm CO2 v H2S c t khi hi so vi H2 l 19,5. Th tch
(ml) dung dch KOH 1M ti thiu hp th ht 4.48 lit hn hp X (ktc) trn l
A.100 B. 150 C. 200 D. 250 Cu 13: Ha tan 200 gam dung dch NaOH 10%
vi 600 gam dung dch NaOH 20% c dung dch A. Nng ca dung dch A l A.
18% B. 16% C. 17,5% D. 21,3% Cu 14: T 20,05 gam dung dch HCl 37% to
c dung dch HCl 13% . Khi lng nc cn dng pha long dung dch l A. 27,35
gam B. 25,52 gam C. 54,14 gam D. 36,92 gam Cu 15: Khi lng ca
CuSO4.5H2O cn thm vo 300 gam dung dch CuSO4 10% thu c dung dch
CuSO4 25% l A. 60 gam B. 125,5 gam C. 115,4 gam D. 40 gam Cu 16:
Trn 200 gam dung dch HCl 1M vi 300 ml dung dch HCl 2M th thu c dung
dch c nng mol l A. 1,6M B. 1,5M C. 1,2M D. 0,15M
Cu 17: T 300 ml dung dch NaOH 2M v nc ct . Mun pha ch dung dch
NaOH 0,75M th th tch nc cn dng l A. 150ml B. 200ml C. 250ml D.
500ml Cu 18: Trn 800ml dung dch H2SO4 aM vi 200ml dung dch H2SO4
1,5 M, th thu c dung dch c nng 0,5M. Vy gi tr ca a l A. 0,1 B. 0,15
C. 0,2 D. 0,25 Cu 19: Cn thm bao nhiu gam H2O vo 500 gam dung dch
NaOH 12% c dung dch NaOH 8%? A. 250 gam B. 200 gam C. 150 gam D.
100 gam Cu 20: T 1 tn qung hematit A iu ch c 420 kg st . T 1 tn
qung manhetit B c th iu ch c 504 kg st. Vy phi trn 2 qung trn theo
t l v khi lng l bao nhiu t 1 tn qung hn hp trn c th iu ch c 480 kg
st? A. 2:5 B. 5:2 C. 1:5 D. 5:1 Cu 21: Khi lng tinh th CuSO4. 5H2O
v khi lng dung dch CuSO4 8% cn ly l bao nhiu thu c 280 gam dung dch
CuSO4 16% ? A.30 gam v 120 gam B. 40 gam v 240 gam C. 30 gam v 130
gam D. 40 gam v 250 gam Cu 22: Cn ha tan bao nhiu lt SO3 ( 136,5oC
v 1atm ) vo 600 gam dung dch H2SO4 24,5% c dung dch H2SO4 49% ? A.
48 lt B. 84 lt C. 76 lt D. 67 lt Cu 23: Trn 10 th tch CH4 vi 9 th
tch hidrocacbon X thu c hn hp kh (ktc) c t khi hi so vi hidro l 17.
Cng thc phn t ca X l A. C2H2 B. C3H4 C. C2H6 D. C4H6 Cu 24: Ha tan
200 gam SO3 vo m gam dung dch H2SO4 49%, thu c dung dch H2SO4
78,4%, Gi tr ca m l A. 133,3 gam B. 146,9gam C. 272,2 gam D. 299,3
gam Cu 25: Cho hn hp gm N2 , H2 v NH3 c t khi hi so vi H2 l 8 vo
dung dch H2SO4 c d th th tch hn hp cn li mt na . Thnh phn % theo th
tch ca mi kh trong hn hp ln lt l A. 25%; 25%; 50% B. 50 %; 25%; 25%
C. 15%; 35%; 50% D. 50%; 15%; 35% Cu 26: . T l khi lng ca hn hp kh
C3H8 v C4H10 i vi H2 l 25,5. Thnh phn % theo th tch ca hn hp kh l
A. 25% v 75% B. 45% v 55% C. 50% v 50% D. 40% v 60% Cu 27: Ha tan
4,59 gam nhm bng dung dch HNO3 long thu c hn hp kh NO v N2O c t khi
hi so vi H2 bng 16,75. Th tch mi kh trong hn hp l A. 2,016 lt ;
0,672 lt B. 4,48 lt ; 6,72 lt C. 9,86 lt ; 0,448 lt D. 3,204 lt ;
8,96 lt Cu 28: Cho hn hp X gm 2 este c cng thc phn t l C4H8O2 v
C3H6O2 tc dng vi NaOH va thu c 59 6,14 gam hn hp 2 mui v 3,68 gam
ancol B duy nht, c t khi so vi oxi l 1,4375. Khi lng ca C4H8O2 v
C3H6O2 ln lt l A. 3,6 gam v 2,74 gam B. 3,74 gam v 2,6 gam C. 4,4
gam v 2,22 gam D. 6,24 gam v 3,7 gam Cu 29:(tt/24) Ha tan m gam Al
bng dung dch HNO3 long, thu c hn hp kh NO v N2O c t khi so vi H2
bng 16,75. T l th tch kh N2O: NO l A. 1: 3 B. 3:1 C. 1: 4 D. 2:3 Cu
30: Cn ly bao nhiu gam oleum71% cho vo 800 gam dung dch H2SO4 20%
th c dung dch H2SO4 90% A. 2451 B. 2548,5 C. 2153,8 D. 2453,9 Cu
31: Cn trn dung dch CuSO4 4% vi H2O theo t l khi lng no c dung dch
CuSO4 1% A. 1:2 B. 2:3 C. 1: 3 D. 2:5
