Baitap điện hóa học

7/22/2019 Baitap in ha hc

1/29

BI TP IN HA

CHNG 11. Hng s phn ly ca NH4OH 25oC l 1,79.10-5.Tm nng ion OHtrong dung dch:

a) NH4OH 0,01M

b) dung dch c cha NH4OH v NH4Cl vi nng c hai cht u l 0,01M.Cho rng

NH4Cl phn ly hon ton.

2. Tch s ion ca nc 25oC l 1,008.10-14. Tnh hng s phn ly ca nc.

3. Hng s phn ly v phn ly ca acid acetic pha t 1,00 mol acid v 1 lt nc s thayi nh th no nu thm vo :

a) 1,00 mol acid acetic.

b) 1,00 mol acid cloacetic.

Bit hng s phn ly ca acid acetic v acid cloacetic tng ng l 1,75 .10-5v 1,38.10-3.

4. Hng s phn ly ca hai acid propionic v l 1,41.10-5v 1,39.10-5. Tnh phn ly cadung dch cha tng acid trn vi nng 0,01 mol/lt, trong dung dch cha ng thi chai acid trn vi nng tng cht l 0,01 mol/lit.

5. Hng s phn ly theo tng nc K1 , K2 ca suynfua hydro l 6.10-8v 1.10-14. Tnh nng

ca ion H+, ion HS-v S2-trong dung dch H2S 0,1M.

6. Cn phi thm bao nhiu nc vo 1,00 lt dung dchNH4OH 0,200 M s phn t phnly tng ln gp i? phn ly trong dung dch u l 0,010.

7.Nng ion H+ trong dung dch acid focmic 0,2M s thay i nh th no nu ta thm vo1 lt dung dch 0,1 mol focmiat natri? Hng s phn ly ca acid trnl 1,8.10-4.

8. Chun mt acid yu HA (Ka= 105) bng phng php in th k vi cht chun NaOH.

Xc nh pH ca dung dch ti hai im VNaOH= 0,9.Vt v ti im tng ng. Vtl th

tch xt ti im tng ng. Cho rng nng ban u ca acid l 0,1 M v th tch dungdch thay i khng ng k trong qu trnh chun .

9.So snh h bng im ca dung dch HCl 0,05N v dung dch CH3COOH 0,05N. Gii

thch. Bit hng s nghim lnh ca nc l 1,86, hng s phn ly ca acid acetic l1,79.105.

10. Nng ion H+ s thay i nh th no nu nh ta thm 0,05 mol acetat natri vo 1 litdung dch acid acetic 0,005M. Bit rng hng s phn ly ca acid acetic l 1,79.105.

11 Trnh by c ch n nh pH ca dung dch m.

Cho cc hn hp sau y:

a: 50 ml CH3COOH 0,1N + 30 ml NaOH 0,1N.

b: 50 ml CH3COONa 0,1N + 40 ml HCl 0,1N.

c: 50 ml CH3COOH 0,1N + 50 ml NaOH 0,1N.

d: 60 ml CH3COONa 0,1N + 60 ml HCl 0,1N.

Hy xc nh hn hp no l dung dch m.

12 Hy sp xp cc dung dchsau y theo th t tng dn ca p sut thm thu:FeCl3, KI, C6H12O6, HCl, HCOOH, CH3COOH

Cc dung dch trn u c nng 0,01M.Gii thch s sp xp ca bn.

13. Hng s phn ly ca CH3COOH 25oC l 1,76.105.Tm nng ion H3O

+ trong dung

dch:


2/29

a) CH3COOH 0,01M.

b) dung dch c cha CH3COOH v CH3COONa vi nng c hai cht u l 0,01M.Cho rng CH3COONa phn ly hon ton.

14.Tnh nng ca ion CH3COO trong 1 lt dung dch cha 1 mol acid acetic v 0,1 mol

acid clohidric. pH dung dchl bao nhiu?

15.Tnh hng s thy phn ca ca florua kali, thy phn trong dung dch 0,01 M v pHca dung dch.

16.Tnh hng s thy phn ca ca clorua amoni, thy phn trong dung dch 0,01 M vpH ca dung dch.

12.Ch tnh ncphn ly th nht, hy xc nh pH ca dung dch Na2CO30,02 N .

13.So snh phn ly ca mui v pH ca hai dung dch cyanua kali 0,1M v 0,01 M.

14.pH ca dung dch mui natri 0,1M vi mt acid hu c yu mt chc l 10. Tnh hng sphn ly ca acid trn.

15.Nng acid acetic l bao nhiu pH dung dch l 5,2.

16.Trn 50 ml acid acetic 0,1M v 20 ml NaOH 0,15 M. Tnh pH ca dung dch to thnh.

17. Chun in th dung dch NH4OH vi cht chun HCl 0,1 Mngi ta thu c cc ktqu sau: im tng ng ng vi 12,3 ml HCl; thi im th tch HCl bng 5ml th pHdung dch l 9,45. Tnh hng s phn ly ca NH4OH.

18. Trn dung dch 108,9 ml acid acetic 1N vi 50 ml NaOH 1N, ri thm nc cho 500ml. Tnh pH ca dung dch to thnh.

19.Ly 15,0 ml dung dch Na2HPO41/15 M v cho thm dung dch KH2PO41/15 M sao choth tch va 100ml. Tnh pH dung dch.

20. ha tan ca oxalat canxi CaC2O4trong dung dch (NH4)2C2O40,1 M s thay i nhth no so vi trong nc.

21. Dung dch ZnCl2cha 0,85 gam cht tan trong 125 gam nc kt tinh 0,23oC. Xc

nh phn ly biu kin(hnh thc)ca ZnCl2.

22.Tnh p sut hi bo ha ca dung dch cha 5 g NaOH trong 180 g nc. Cho rng phn ly hnh thc ca NaOH trong dung dch ny l 0,8.

24. phn ly ca acid focmic trong dung dch 0,02M l 0,03. Tnh hng s phn ly v pK.

25. nng no ca HNO2th phn ly s l 0,2?

26. nng no ca HNO2th phn ly ca dung dch s bng phn ly ca dung dch

acid acetic 0,1 M ?

27.Nng ion H+v pH ca dung dch acid focmic bng bao nhiu nu phn ly = 0,03.

28.Ha tan 0,5 mol ng v 0,2 mol CaCl2vo hai th tch nc bng nhau. Nhit kttinh ca hai dung dch to thnh bng nhau. Tnh phn ly hnh thc ca dung dch CaCl2.

29. 100oC p sut hi bo ha trn dung dch cha 0,05 mol suynphat natri trong 450 gnc bng 756,2 mmHg. Xc nh phn ly hnh thc ca mui.

30.Trong 1 lt dung dch acid acetic 0,01M cha 6,26.1021phn t v ion. Xc nh phnly v hng s phn ly ca acid trn.

32.Ch ra quan h gia p sut thm thu trong dung dch 0,1M KNO3(P

1) v dung dch 0,1

M CH3COOH (P2):

a) P1 > P2 .

b) P1 < P2 .


3/29

c) P1 = P2 .

33.Nhit kt tinh ca dung dch HCN 1M v glucoza 1M gn bng nhau. C th kt lung v phn ly ca HCN:

a) phn ly ca HCN gn bng 1.b) phn ly ca HCN gn bng khng.c) phn ly ca HCN bng 0,5.

34.Hy ch ra tng quan gia nhit si ca hai dung dch v cng long c cng nng ca AlCl3(T1) v CaCl2 (T2).

a) T1= T2 .

b) T1> T2.

c) T1 < T2.

d) Khng d liu nh gi.

35. Hy sp xp theo ng th t gim dn ca p sut thm thu trong cc dung dch0,01M:

a) CH3COOH - NaCl - C6H12O6- CaCl2

b) C6H12O6- CH3COOH - NaCl - CaCl2c) CaCl2 - NaCl - CH3COOH - C6H12O6d) CaCl2 - CH3COOH - C6H12O6 - NaCl

36.Hy ch ra tng quan gia nhit kt tinh ca hai dung dch NH 4Cl (T1) v CH3CHO(T2). Mi dung dch cha 5 g cht tan trong 100 gnc.

a) T1= T2 .

b) T1> T2.

c) T1 < T2.


37.Hy ch ra tng quan gia gi tr nng lng Gbbs chun thc ca qu trnh phn ly ca

nc H2O (Go

1) v ca CH3COOH(Go

2).a) Go1 = Go2 .

b) Go1 > Go2

c) Go1 < Go2.


38.Xc nh nng H2CO3, HCO3v HCO3

2trong dung dch acid cacbonic 0,01M, nupH ca dung dch ny l 4,18.

39. pH ca cc dung dch sau s thay i th no nu pha long dung dch hai ln?a) Dung dch HCl 0,2M.

b) Dung dch CH3COOH 0,2 M.

c) Dung dch cha 0,1 mol/lit CH3COOH v 0,1 mol/lit CH3COONa.40.Hng no trong cc hng di y c sp xp theo th t tng dn ca pH trong ccdung dch c cng nng mol:

a) HCN - HF - HClO -HCOOH - CH2ClCOOH.

b) HNO3- HNO2- CH3COOH - HCN.

c) HCl - CH2ClCOOH - HF - H3BO3.

d) H2SO4- HCN - HF - HCl - CH2ClCOOH

41. acid ca dung dch HCN 0,2N s thay i nh th no nu thm vo KCN cnng KCN 0,5 mol/lit?

a) Tng c) Khng thay i.

b) Gim. d) Tng thm 0,5 ion-gam/l.42.C bao nhiu ion H+ trong 1 ml dung dch c pH bng 13?

a) 1013 b) 6,02.1013 c) 6,02.107 d) 6,02.1010.


4/29

43.pH ca nc s thay i th no nu thm 0,01 mol NaOH vo 10 lt nc:a) Tng 2 n v. c) Tng 4 n v.

b) Tng 3 n v. d) Gim 4 n v.

44.pH ca dung dch trung tnh 50oC l bao nhiu?a) 5,5 c) 7,0 b) 6,6 d) 7,5

45.T l gia nng ca ion H+

trong dung dchacid benzoic 1,00.103

M trong nc vhng s phn ly ca acid l 99. Tnh hng s phn ly.

46. Acid HX 0,150 mol/kg trong nc c phn ly l 7,3 %. Tnh nhit kt tinh v nhit si ca dung dch.

47. Mt dung dch c cha 0,01 mol/lt KI, 0,10 mol/lit KBr v 0,10 mol/lit KCl . Cho t tdung dch AgNO3vo dung dch trn . Cht no s kt ta u tin?

a) AgI. d) C hai AgBr v AgCl .b) AgBr e) Khng th bit c tcc thng tin trn.c) AgCl .

Cho TAgI=1,5.10-16, TAgBr=3,3.10

-13, TAgCl= 1,8.10-10.

48. Dung dch amoniac 0,1M c cha clorua amoni c nng ion OHl 3,6.106. Nng ion amoni s l bao nhiu ?

NH3 + H2O NH4+ + OH

a) 0,50 b) 0,34 c) 0,94 d) 0,74 e) 0,64.

49.Nng ca dung dch HNO3bng bao nhiu pH dung dch bng 3.a) 3 b) 3 c) - Antolog[3] d)Tt c u sai e) 103

50. Ion no di y trong nc c th va ng vai tr acid ln baz Bronsted?a) HCO3

b) CN c) SO42 d) PO4

3 e) NO3

51. Ha tan mt lng tha BaSO4trong nc. Tch s tan ca mui ny l 1.1010. Nng

ion bari trong nc s l bao nhiu?a) 10- M.

b) 10-5 M.

c) 10-6 M.

d) 10- M.

e) 10-20 M.

52. Xc nh tch s tan ca mui MX2nu dung dch bo ha cha 0,02 mol trong 100 mldung dch.

a) 0,20.

b) 0,0034.

c) 0,08.

d) 0,032.

e) 0,016.

53. Gi tr no di y gn vi pH ca dung dch NaOH 104M nht?a) 11

b) 10,2

c) 9

d) 7

e) 4

53. Hng s phn ly ca EDTA (H4Y)nh sau:H4Y + H2O H3O

+ + H3Y K1 = 1,02 .10

2

H3Y + H2O H3O

+ + H2Y2 K2 = 2,14 .10

3

H2Y2 + H2O H3O

+ + HY3 K3 = 6,92 .107

HY3 + H2O H3O+ + Y4 K4 = 5,50 .10

11

Tm biu thc xc nh nng chung Cy ca EDTA.a) Cy = [Y4] + [HY3] + [H2Y2] + [H3Y] + [H4Y]

b) Cy = [HY3] + [H2Y2] + [H3Y] + [H4Y]c) Cy = [Y4] + [HY3] + [H2Y2] + [H3Y]d) Cy = [Y4] + [HY3] + [H2Y2] + [H3Y] + [H3O+]


5/29

e) Cy = [Y4] + [HY3] + [H2Y2] + [H3Y] + [OH]55. Tnh nng ti thiu(M) ca ion Br cn thit kt ta AgBr t dung dch c nng ion Ag+ l 1,0.105mol/lt. ( TAgBr= 4,0.10

-13).

a) 4,0.1010 b) 4,0.1011 c) 4,0.10-9 d) (40)1/2.106 e) 4,0.108

56. Hng s thy phn ca Al3+ trong nc l 1,4.105. Nng ion H3O+ trong dung dch

AlCl3l bao nhiu?a) (1,4. 105) 1/2M d) 1,4. 104 M

b) (1,4. 106) 1/2M e) Tt c u sai.c) (1,4. 104) 1/2M

57. Tnh pOH ca dung dch hnh thnh t s trn ln 70 ml dung dch NH 3 0,1 M v 60 mldung dich HCl 0,05 M.

a) lg (1,8.10-5) - lg (0,03 / 0,04)

b) -lg (1,8.10-5) + lg (4,0 / 3,0)

c) -lg (1,8.10-5) + lg (0,004 / 0,003)

d) -lg (1,8.10-5) - lg (0,004 / 0,003)

58. Sp xp cc cht di y theo tng ca tnh acid: H3O+, H2O, H2, H3O+, HSO4-v HF.a) H2O < HF < H2 < H3O

+ < HSO4-

b) HF < H2O < H2 < HSO4- < H3O

+

c) H2 < HF < H2O < H3O+ < HSO4

-

d) H2 < H2O < HF < HSO4- < H3O

+

e) H2O < H2 < H3O+< HF < HSO4

-

59.Nng ion H+l bao nhiu trong dung dch KOH 0,0020 M?a) [H+ ] = Kw / [0,0020]

b) [H+ ] = Kw . [0,0020]

c) [H+ ] = [0,0020] / Kw

d) [H+

] = -log { Kw / [0,0020]}e) Khng c cu no ng c.

60. Hng s thy phn ca phn ng NH4 + H2O NH3 + H3O+ l 5,6.1010 25oC. pH

ca dung dch NH4 Cl s gn vi gi tr no nht?a) 4 b) 5,5 c) 5 d) 4,5 e) 6

61. Mt dung dch m cha NaHCO3 , H2CO3 c pha sao cho pH=7. T l nng gia[NaHCO3 ]/ [H2CO3] l bao nhiu nu bit hng s phn ly ca acid ny l 4,3 . 10

-7.

a) 43. d) 86.

b) 4,3. e) 1,29.

c) 0,43.

62. Dung dch A cha NaHCO3, vi nng mi cht l 0,1 mol/lit. Cho 0,01 mol HCl vo 1lt dung dch ni trn. pKaca H2CO3 l 6,37. pH ca dung dch hnh thnh s gn vi gi trno nht?

a) 6,37 b) 4,35 c) 6,28 d) 2,10 e) 5,84

63.Cho 50 ml dung dch Na2SO41 M vo dung dch cha ion Ba+2th bt u xut hin kt

ta suynfat bari. Th tch cui cng ca hn hp l 500 ml. Tch s tan ca BaSO4l 1.1010.

Nng (M) ca Ba2+trong dung dch ban u l bao nhiu?a) 5,0.109 b) 1,0.109 c) 2,0.109 d) 1,1.109 e) 9,0.109

64. Ta c dung dch cha ion Ag+v ion Ca+2vi nng tng ion l 0,01M. kt ta

chn lc ion bc cnthm vo dung dchion no trong s nhng ion sau y?a) SO4

2 (TCa SO4 = 2,4.105, TAg2 SO4 = 1,2.10

5)

b) OH (TCa (OH)2 = 1,3.10-6, TAgOH = 2,0.10

8)


6/29

c) PO43 (TCa3 (PO4)2 = 1,3.10

32, TAg3PO4 = 1,8.1018)

d) Tt c ccion trong s trn u c.e) Khng ion no c.

65. Acid oxalic HOOCCOOH c pKa1 = 1,23 v pKa2 = 4,19. Gi s c dung dch acidoxalic; pH no th nng dng [HOOCCOO] s ln nht?

a) 1,23 b) 2,71 b) 4,19 d) 14,0 e) 7,55

Hng s phn ly ca mt s axit trong nc 25oC

Cht in ly Phng trnh phn ly KaC6H5COOH C6H5COOH C6H5COO

-+ H+ 6,3.10-5

C6H5OH C6H5OH C6H5O-+ H

+ 1,3.10-10

CH3COOH

CH2ClCOOH

CH3COOH

CH2ClCOOH

CH3COO-+ H

+

CH2ClCOO-+ H

+

1,75.10-5

1,38.10-3

H2B4O7 H2B4O7

HB4O

7

-

H+ + HB4O7-

H

+

+ B4O7-2

K1= 1,8.10-4

K2= 2,0.10

-8

H2C2O4 H2C2O4

HC2O4-

H+ + HC2O4-

H+ + C2O4-2

K1= 5,6.10-2

K2= 5,4.10-5

H2CO3 H2CO3

HCO3-

H+ + HCO3-

H+ + CO3-2

K1 = 4,5.10-7

K2=4,7.10-11

H2CrO4 H2CrO4

HCrO4-

2HCrO4-

H+ + HCrO4-

H+ + CrO4-2

Cr2O7-2 + H2O

K1=1,8.10-1

K2=3,2.10-7

3,0.10-2

H2S H2S

HS-

H+ + HS-

H+ + S-2

K1=1.0.10-7

K2=2.5.10-13

H2O2 H2O2 H+ + HO2- K1=2,0.10-12H2S2O3 H2S2O3

HS2O3-

H+ + H2SO3-

H+ + S2O3-2

K1=2,5.10-11

K2=1,9.10-2

H2SeO3 H2SeO3

HSeO3-

H+ + HSeO3-

H+ + SeO3-2

K1=1,8.10-3

K2=3,2.10-9

H2SeO4 H2SeO4

HSeO4-

H+ + HSeO4-

H+ + SeO4-2 K2=8,9.10

-3

H2SO3 H2SO3

HSO3-

H+ + HSO3-

H+ + SO3-2

K1=1,4.10-2

K2=6,2.10-8

Cht in ly Phng trnh phn ly Ka

H2TeO3 H2TeO3

HTeO3-

H+ + HTeO3-

H+ + TeO3-2

K1=2,7.10-3

K2=1,8.10-8

H2TeO4 H2TeO4

HTeO4-

H+ + HTeO4-

H+ + TeO4-2

K1=2,5.10-3

K2=4,1.10-11

H3AsO4 H3AsO4

H2AsO4-

HAsO4-2

H++ H2AsO4-

H++ HAsO4-2

H++ AsO4-3

K1= 5,6.10-3

K2= 1,7.10-7

K3= 2.9.10-12

H3BO3 H3BO3

H2BO3-

HBO3

-2

H++ H2BO3-

H++ HBO3-2

H+

+ BO3-3

K1 = 7,1.10-10

K2 = 1,8.10-13

K3= 1,6.10-14

H3PO3 H3PO3

H2PO3-

H+ + H2PO3-

H+ + HPO3-2

K1= 3,1.10-2

K2= 1,6.10-7


7/29

H3PO4 H3PO4

H2PO4-

HPO4-2

H+ + H2PO4-

H+ + HPO4-2

H+ + PO4-3

K1 = 7,1.10-3

K2= 6,2.10-8

K3= 5,0.10-13

H4P2O7 H4P2O7

H3P2O7-

H2P2O7-2

HP2O7-3

H+ + H3P2O7-

H++ H2P2O7-2

H+ + HP2O7-3

H+ + P2O7-4

K1= 1,2.10-1

K2= 7,9.10-3

K3= 2,0.10-7

K4= 4,8.10-10

HBrO HBrO H+ + BrO- 2,2.10-9

HBrO3 HBrO3 H+ + BrO3

- 2,0.10-1

HClO HClO H+ + ClO- 3,0.10-8

HClO2 HClO2 H+ + ClO2

- 1,1.10-2

HCN HCN H+ + CN- 4,9.10-10HCNS HCNS H+ + CNS- 1,4.10

-1

HCOOH HCOOH HCOO -+ H+ 1,8.10-4

HF HF H+ + F- 6,2.10-4

Hng s phn ly ca mt s baz trong nc 25oC

Baz Phng trnh phn ly KbAmonium

Anilin

Benzidine

Ethylamine

Hidroxilamin

Methylamin

Oxiquinoline

Piridine

UrUrtrpin

Quinoline

NH4OH

C6H5NH2 +H2O

(C6H4)(NH2)2 +

H2OC2H5NH2 + H2O

NH2OH + H2OCH3NH2 + H2O

C9H7ON+ H2O

C5H5N + H2O

CO(NH2)2 + H2O(CH2)6N4 + H2O

C9H7N + H2O

NH4+

+ OH-

C6H5NH3+

+ OH-

(NH2)(C6H4)(NH3)++OH

-

(C6H4)(NH3)2++OH

-

(C2H5NH3)+

+ OH-

NH3OH+

+ OH-

CH3NH3+

+ OH-

C9H7ONH+

+ OH-

C5H5NH+

+ OH-

(NH2)CO(NH3)+ + OH

-

C9H7NH+

+ OH-

1,8.10-5

4,2.10-10

9,3.10-10

5,6.10-10

4,7.10-4

9,6.10-9

4,8.10-4

1,0.10-9

1,5.10-9

1,5.10-14

1,4.10-14

6,3.10-10


8/29

Tch s tan ca cht in ly t tan.

Cht in ly Nhit (oC) TAgBr

AgCl

Ag2CrO4Ag2Cr2O7AgI

Ag2SO4

BaCO3BaSO4

CaCO3

Ca(COO)2

Ca(OH)2CaSO4Cu2Br2

CuCO3

Cu2Cl2

Cu2I2

FeCO3Fe(OH)2

Fe(OH)3Hg2Cl2

HgO

KClO4

MgCO3.2H2O

Mg(OH)2Mn(OH)2

NiCO3

PbCl2PbI2

ZnCO3Zn(COO)2Zn(OH)2

25

25

25

2525

25

25

25

25

25

25

25

25

25

25

25

2518

1825

25

25

25

25

1825

25

25

18

25

20

6,3.10-13

1,56.10-10

4,05.10-12

2,0.10-71,5.10

-16

7,7.10-5

7,0.10-9

1,08.10-10

4,8.10-9

2,57.10-9

3,1.10-5

6,26.10-5

5,3.10-9

2,36.10-10

1,8.10-7

1,1.10-12

2,11.10-114,8.10

-16

3,8.10-38

1,1.10

-18

1,7.10-26

1,07.10-2

1,0.10-5

5,5.10-12

4.10-14

1,35.10

-7

1,7.10-5

8,7.10-9

6,0.10-11

1,35.10-9

4,0.10-16


9/29

CHNG 2

1. Tnh hng s cn bng ca cc phn ng ion da trn H, S to thnh ca cc ion trongdung dch.

Cu2+ + Zn Cu + Zn2+

H+

+ OH-

H2OFe3+ + I- Fe2+ + I2

2. Vit chu trnh kn xc nh entalpy hydrat ha ca ion Mg2+da trn cc s liu sauy:

Entalpy thng hoa ca Mg: +167,2 kJ/mol.

Th ion ha th nht ca Mg: 7,646 eV

Th ion ha th hai ca Mg: 15,035 eV

Entalpy phn ly ca Cl2: +241,6 kJ/mol.

Ai lc in t ca Cl: -3,78 eV

Entalpy ha tan ca MgCl2: -150,5 kJ/mol.

Entalpy hydrat ha ca Cl-: -383,7 kJ/mol.

-1892,2 kJ/mol

3. Tnh entalpy hydrat ha ca ion CaCl2bit nng lng mng tinh th ca CaCl2 l2255kJ/mol, Entalpy hydrat ha ca Cl-: -383,7 kJ/mol.

-1568,9 kJ/mol


10/29

CHNG 3

1. Chng minh rng lc ion ca KCl, MgCl2, FeCl3, Al2(SO4)3v CuSO4lin h vi nng molan bi cc biu thc sau: J(KCl) = m, J(MgCl2) = 3m, J(FeCl3) = 6m, J(Al2(SO4)3) = 15mv J(CuSO4) = 4m.

2. Tnh lc ion ca dung dch cha ng thi KCl v CuSO4vi nng tng ng l 0,10v 0,20 mol/kg.

(0,90 mol/kg)

3. Tnh nng ca dung dch cha K3[Fe(CN)6] 0,040mol/kg, KCl 0,030 mol/kg v NaBr0,050 mol/kg.

(0,320 mol/kg)

4. Tnh khi lng a) Ca(NO3)2ring bit, b) NaCl cn thit phi thm vo dung dch KNO 30,150 mol/kg trong nc v cha 500 gam dung mi lc ion c gi tr l 0,250 mol/kg.

a) 2,73 g b) 2,92 g

5. Dung dch CuSO4phi c nng bao nhiu c lc ion bng vi dung dch KCl 1,00mol/kg.0,250 mol/kg

6. Hy a ra biu thc tnh h s hot ion trung bnh ca CaCl2t h s hot ca ccion ring bit.

f= (f+.f-2)1/3

7. S dng php gn ng th nht Debye Hckel tnh h s hot ion trung bnh caCaCl2trong dung dch cha CaCl20,010 mol/kg v NaF 0,030 mol/kg.

0,56

8. H s hot ion trung bnh ca dung dch La(NO3)30,500 mol/kg o c bng thcnghim l 0,303 25oC. Tnh sai bit (tnh theo %) ca php gn ng th nht Debye Hckel so vi thc nghim.

1.102 %

9. H s hot ion trung bnh ca ba dung dch HBr trong nc 25oC o c l 0,930 (5,0 mmol/kg); 0,907 ( 10,0 mmol/kg) v 0,879 ( 20,0 mmol/kg). Tnh hng s A trong phpgn ng th hai Debye - Hckel.

2.03

10.H s hot ion trung bnh ca dung dch NaCl trong nc 25oC c cho trong bngsau. Chng minh rng cc s liu sau tha mn php gn ng th nht Debye - Hckel.m (mmol/kg) 1,0 2,0 5,0 10,0 20,0

f 0,9649 0,9519 0,9275 0,9024 0,8712

T cc s liu trn p dng php gn ng th hai Debye - Hckel, hy tnh hng s A.

11. Chng minh rng ha tan ca dung dch cht in ly t tan 1:1 lin h vi tch s ionbi biu thc

s T es

1 2 1 17/ .

12. Cht in ly t tan MX c tch s tan l T, ha tan l s. Chng minh rng trong dungdch cht in ly mnh NX nng C phn ly hon ton th ha tan ca MX s l


11/29

s C T C' ( ) 1

242

v s T

C' khi T nh.

Cho rng dung dch trn l dung dch l tng.

12. Chng minh rng, nu lc ion ca dung dch cha ng thi cht in ly t tan MX vcht in ly mnh NX c quyt nh bi nng C ca cht in ly mnh, v dung dchny tun theo php gn ng th nht Debye Hckel; th ha tan s trong hn hp ctnh theo biu thc:

s T

Ce

h C'

,

4 61

13. ha tan ca clorua bc trong nc 25oC l 1,274.105mol/kg. Ap dng php gnng th nht Debye Hckel hy tnh: a)Nng lng Gibbs chun thc ca phn ng hatan AgCl Ag+ + Cl; b) ha tan ca AgCl trong dung dch K2SO40,200 M.

55,9 KJ/mol, 1,7.10-5mol/kg

14. Ap dng php gn ng th nht Debye - Hckelhy tnh phn ly ca acid acetic trongnc 25oC ng vi nng acid l 0,100 mol/kg.

1,4 %

15. Cho dung dch HCl 0,100M. S dng php gn ng th nht Debye - Hckelhy tnh pHca dung dch trn.

1,2

16. H s hot ion trung bnh ca dung dch KCl 3,00.10 -3mol/kg v BaCl21,00.10-3 ln

lt l0,94 v 0,88. Ch s dng cc d kin m bi cho, hy tnh h s hot ca ionBa2+.

0,77

17. S dng php gn ng th nht Debye - Hckelhy tnh hot ion trung bnh ca dungdch HCl, KCl, ZnCl2trong cc dung dch tng ng v so snh kt qu l thuyt vi nhnggi tr thc nghim thu c t bng sau:

Nng fthc nghim

mol/kg HCl KCl ZnCl2

1,00. 10-3

5,00. 10-3

1,00. 10-2

2,00. 10-2

5,00. 10-3

1,00. 10-1

2,00. 10-1

0,9660,928

0,904

0,876

0,830

0,796

0,766

0,9660,927

0,902

0,862

0,816

0,770

0,718

0,8810,780

0,731

0,666

0,578

0,515

0,459

Hy xc nh xem php gn ng th nht Debye - Hckelc th p dng khong nng no?

18. S dng php gn ng th hai ca Debye - Hckelhy tnh hot ion trung bnh cacc dung dch HCl 0,100M , MgCl20,100M v ZnSO4 0,100M.


12/29

0,754; 0,16; 0,436

19. Tnh lc ion ca dung dch BaCl20,01 M?

a) 0,03 b) 0,04 c) 0,01

d) 0,02 e) 0,00

20. Tnh lc ion ca dung dch cha H2SO4 0,01M v CH3COOH 0,01 M?a) 0,03 b) 0,04 c) 0,01

d) 0,02 e) 0,06


13/29

C

o

CHNG 4

1. o dn ca cc dung dch khc nhau bng cng mt bnh o dn. Dung dch KCl0,050M cho in tr 243. Dung dch NaOH 0,010M cho in tr 681. Tnh dn in ringv dn in ng lng ca dung dch NaOH 0,010M. Bit dn in ring ca dung

dch KCl 0,05M l 6,67.10-3 -1cm-1.

2. dn in ring ca dung dch acid propionic C2H5COOH 0,010M l 1,41.10-4

-1

cm-1

,

dn in ng lng cc i ca acid ny l 385,6 -1.cm2.lg-1. Tnh phn ly va acid

propionic trong dung dch trn. Tnh hng s phn ly ca acid trn.

3. dn in ti hn ca dung dch picrat kali l 103,97 -1cm2lg-1 v linh ion ca ionkali l 73,58 -1cm2lg-1. Tnh linh v s ti ca ion picrat trong dung dch v cng long.

4.Ngi ta xcnh ha tan ca phc t tan Co2Fe(CN)6bng cch o dn in cadung dch bo ha. dn in ring ca dung dch bo ha l 2,06. 10 -6 -1 cm-1, ca ncc dng pha dung dch l 4,1. 10-7 -1 cm-1. Linh ca ion Co2+ v Fe(CN)6

- 4 tngng l 43 v 111 (-1cm2lg-1). Tnh ha tan ca phc trn.

5.Dung dch LiX 0,1000M c dn in ring l 0,0090 S.cm-1

25o

C. Linh ca ion Li+

l 39,5 S.cm2lg-1.

a) Tnh dn in ng lng ca dung dch.b) Tnh linh ca anion X-.

6. in phn dung dch ca cht in ly mnh AB vi cng dng 0,100 ampe vi thigian 9650 giy. Phn ng in cc l:

A A+ + e

A+ + e ANng molan ca dung dch ban u l 0,1. Sau khi in phn kt qu phn tch anolit

cho thy c 0,0165 mol AB trong 100 gam nc. Tnh s ti ca cc ion trong dung dch trn.

7. Ion no c tc chuyn ng tuyt i ln nht trong s cc ion di y?a) Be2+ c) Rb+ e) Ca2+

b) Mg2+ d) H+

d

8. ng di y biu din s ph thuc gia o(S.cm2mol-1) vo C (mol/lit)1/2. dc

ca ng thng trn cho ta gi tr:

a) dn in mol cc i o.

b) H s Kohlrausch.

c) dn in mol.

d) Hng s bnh.

e) in tr ring . b

9. Tnh dn in cc i oca NH4 OH. Bit dn in cc i oca cc cht NH4Cl,NaOH, NaCl tng ng l 150, 248 v 127 -1cm2mol-1.

a) 525 c) 271 e) 121

b) 29 d) 98 c

10. dn in ring ca nc tinh khit l 7.10-8 -1cm-1. dn in mol ca nc l:a) 1,26.10-6 b) 1,26.10-9 c) 3,89.10-6d) 3,89.10-11 e) Khng c cu no ng c.

a


14/29

11. Dung dch NaOH 0,020N ( = 0,15 -1m-1 ) c dng xc nh hng s in cc.in tr o c l 680 . Tnh hng s in cc .a) 0,15 / 680 d) 0,02 . 680

b) ( 0,15 . 0,02 ) / 680 e) 1 / ( 0,15 . 680)

c) 0,15 . 680

12. dn in ca acid formic nng 0,0250 M l 8,27.10 -4S.cm-1. Tnh pKa. Cho rng

dung dch trn l dung dch l tng.

13. dn in ring ca acid sulfuric 4% l 0,168 S.cm-1. T trng ca dung dch l 1,026g/cm3. Tnh dn in ng lng ca dung dch.

14. dn in ca acid propionic nng 0,135 M l 4,79.10-2S.m-1. Tnh pH ca dungdch, pKaca acid. Cho rng dung dch trn l dung dch l tng. Bit-= 37,2 S.cm

2lg-1.

15. Tnh dn in ng lng ca dung dch etilamin C2H5NH3OH pha long 16l/mol. Bit dn in ng lng ti hn l 232,6 S.cm2lg-1. dn in ring ca dungdch trn l 1,312.10-3S.cm-1. Nng ion OH-, phnly, hng s phn ly l bao nhiu?

16. Hng s phn ly ca acid maleic l 1,54.10-5mol/l. Tnh phn ly, nng ion H+ pha long 1024 l/mol. Bit dn in ng lng trong dung dch trn l 41,3 S.cm2lg-1.Tnh dn in ng lng ti hn.

17. dn in ring ca dung dch MgCl25% l 4,38 S.m-1. T trng ca dung dch l 1,039

g/cm3. Tnh dn in ng lng v phn ly biu kin ca dung dch. Bit Mg2+=44,6 v NO3-= 62,6 S.cm

2lg-1.

18. dn in ring ca dung dch CH3COOH 5,00.10-2M l 3,24.10-2S.m-1. dn in

ring ca dung dch CH3COONa 5,00.10-2M l 7,75.10-4S.m-1. Tnh hng s phn ly ca acid

acetic, cho rng mui phn ly hon ton.

19. Tnh dn in ring v dn in ng lng ca dung dch CuSO40,050M. Bit

rng nu thit din in cc l 4 cm2v khong cch gia chng l 7 cm th in tr o cl 230 om.

20. dn in ring ca dung dch KI l 89,0 S.m-1. dn in ring ca dung dch KCl l186 S.m-1. T hai dung dch trn pha dung dch cha ng thi hai mui c dn in ringl 98,5 S.m-1. Tnh phn trm ca mi dung dch ban u trong hn hp.

27. in phn dung dch HCl tnh s ti. Lng ionCl- trong catlid trc v sau inphn tng ng l 0,177 v 0,163 iongam. Trong culng k bc mc ni tip lng Ag giiphng trn catd tng ng vi 0,083 iongam Cl-. Tnh s ti ca H+v ionCl-.

28. S ti ca anion trong cc dung dch NaCl 0,1M, KCl 0,1M, NaBr 0,1M ln lt l 0,603,

0,504, 0,605. xc nh s ti ca cc ion trong dung dch KBr 0,1M. Cho rng cc dung dchtrn l dung dch l tng.

29. Bng sau cho cc cp gi tr dn in ng lng v nng ca dung dch KNO 3.Tnh dn in ng lng ti hn.10 .C/ mol/l 0,500 1,00 5,00 10,0 50,0 100

/S.cm2.mol-

1

124.4 123,6 120,5 115,8 109,9 104,8

30. dn in ring ca dung dch KCl 0,500 M 18 oC l 5,12 S.m-1. H s nhit ca dn in ring l 0,0208 K-1. Tnh dn in ng lng ca dung dch 25oC.

31. 18oC vn tc chuyn ng tuyt i ca ion H+ v ion valeric l 3,242.10-4 v 2,662.10-4 cm2V-1s-1. H s nhit ca vn tc tng ng l 0,0154 v 0,0244 K-1. Tnh dn inng lng ti hn ca dung dch acid valeric 25oC.


15/29

BI TP CHNG I

1. Hng s phn ly ca CH3COOH 25oC l 1,76.10-5.Tm nng ion H3O

+ trong dung

dch:a) CH3COOH 0,01M.

b) dung dch c cha CH3COOH v CH3COONa vi nng c hai cht u l 0,01M.

Cho rng CH3COONa phn ly hon ton.2.Tch s ion ca nc 25oC l 1,008.10-14. Tnh hng s phn ly ca nc. Trong 1,00mlnc c bao nhiu phn t nc b phn ly. c mt phn t nc phn ly cn c baonhiu phn t nc.3.Hng s phn lyv phn ly ca acid acetic pha t 1,00 mol acid v 1 lt nc s thay inh th no nu ta thm vo :

a) 1,00 mol acid acetic.

b) 1,00 mol acid cloacetic.

4. Hng s phn ly ca hai acid propionic v butanoic l 1,41.10-5v 1,39.10-5. Tnh phnly : a) ca dung dch cha tng acid trn vi nng 0,01 mol/lt ; b) trong dung dch chang thi c hai acid trn vi nng mi cht l 0,01 mol/lt.

5. Hng s phn ly theo tng nc K1 , K2 ca suynfua hydro l 1.10-7v 2,5.10-13. Tnh nng ca ion H+, ion HS-v S2-trong dung dch H2S 0,1M.6.Cn phi thm bao nhiu nc vo 1,00 lt dung dch NH 4OH 0,200 M s phn t phnly tng ln gp i? phn ly trong dung dch u l 0,010.7. pha long ca dung dch phi l bao nhiu nng ion H+trong dung dchphenol l1,00.10-6mol/lit? Hng s phn ly caphenol l 1,3.10-10.8.Nng ion H+ trong dung dch acid focmic 0,2M s thay i nh th no nu ta thmvo 1 lt dung dch 0,1 mol focmiat natri? Hng s phn ly ca acid trn l 1,8.10-4.9.Tnh nng ca ion CH3COO

- trong 1 lt dung dch cha 1 mol acid acetic v 0,1 molacid clohidric. pH ca dung dch l bao nhiu?10.Tnh hng s thy phn ca florua kaliv pH ca dung dch KF 0,01M,bit hng s phnly ca HF l 6,2.10-4.11.Tnh hng s thy phn ca clorua amoni v pH ca dung dch NH4Cl 0,01M, bit hng s

phn ly ca NH4OH l 1,8.10-5.

12.Ch tnh nc thy phn th nht hy xc nh pH ca dung dch Na 2CO30,02N (K1caH2SO4l 4,5.10

-7).

13.So snh phn ly ca mui v pH ca hai dung dch cyanuakali 0,1M v 0,01M.14.pH ca dung dch mui natri 0,1M vi mt acid hu c yu mt chc l 10. Tnh hng s

phn ly ca acid trn.15.Nng acid acetic l bao nhiu pH dung dch l 5,2.16.Trn 50 ml acid acetic 0,1M v 20ml NaOH 0,15M. Tnh pH ca dung dch to thnh.17. Chun in th dung dch NH

4OH vi cht chun HCl0,1 M ngi ta thu c cc kt

qu sau: im tng ng ng vi 12,3 ml HCl; thi im th tch HCl bng 5ml pH dungdch l 9,45. Tnh hng s phn ly ca NH4OH.18. Trn dung dch 108,9 ml acid acetic 1N vi 50 ml NaOH 1N, ri thm nc cho 500ml. Tnh pH ca dung dch to thnh.19.Ly 15,0 ml dung dch Na2HPO41/15M v cho thm dung dch KH2PO41/15M sao choth tch va 100ml. Tnh pH dung dch.20. ha tan ca oxalat canxi CaC2O4trong dung dch (NH4)2C2O4 0,1M s thay i nhth no so vi trong nc; bit tch s tan ca CaC2O4 25

oC l 2,57.10-9.

21. Dung dch ZnCl2cha 0,85gam cht tan trong 125 gam nc kt tinh -0,23oC. Xc nh

phn ly hnh thc ca ZnCl2.

22.Tnh p sut hi bo ha ca dung dch cha 5 gam NaOH trong 180gam nc. Cho rng phn ly hnh thc ca NaOH trong dung dch ny l 0,8.


16/29

23.Tnh h s ng trng ca dung dch 0,2M ca cht in ly nu s tiu phn trong 1 litdung dch l 2,18.1023.24. phn ly ca acid focmic trong dung dch 0,02M l 0,03. Tnh hng s phn ly v pK.25. nng no ca HNO2th phn ly s l 0,2?26. nng no ca HNO2th phn ly ca dung dch s bng phn ly ca dung dchacid acetic 0,1M ?

27.Nng ion H+

v pH dung dch acid focmic bng bao nhiu nu =0,03.28.Ngi ta ha tan 0,5 mol ng v 0,2 mol CaCl2vo hai th tch nc bng nhau. Nhit kt tinh ca hai dung dch to thnh bng nhau. Tnh phn ly hnh thc ca dung dchCaCl2.

29. 100oC p sut hi bo ha trn dung dch cha 0,05 mol suynphat natri trong 450 gamnc bng 756,2 mmHg. Xc nh phn ly hnh thc ca mui.30.Trong 1 lt dung dch acid acetic 0,01M cha 6,26.1021phn t v ion. Xcnh phnly v hng s phn ly ca acid trn.32. Ch ra quan h gia p sut thm thu trong dung dch 0,1M ca KNO 3 (P1) vCH3COOH (P2):

a) P1 > P2 .

b) P1 < P2 .c) P1 = P2 .

33.Nhit kt tinh ca dung dch HCN 1M v glucoza 1M gn bng nhau. C th kt lung v phn ly ca HCN:

a) phn ly ca HCN gn bng 1.b) phn ly ca HCN gn bng khng.c) phn ly ca HCN bng 0,5.

34.Hy ch ra tng quan gia nhit si ca hai dung dch v cng long c cng nng ca AlCl3(t1) v CaCl2 (t2).

a) t1= t2 .

b) t1> t2.

c) t1 < t2.

d) Khng d liu nh gi.35. Hy sp xp theo ng th t gim dn ca p sut thm thu trong cc dung dch0,01M:

a) CH3COOH - NaCl - C6H12O6- CaCl2

b) C6H12O6- CH3COOH - NaCl - CaCl2c) CaCl2 - NaCl - CH3COOH - C6H12O6d) CaCl2 - CH3COOH - C6H12O6 - NaCl

36.Hy ch ra tng quan gia nhit kt tinh ca hai dung dch NH4Cl (t1) v CH3CHO(t2). Mi dung dch cha 5 gam cht tan trong 100 gam nc.

a) t1= t2 .b) t1> t2

c) t1 < t2.

d) Khng d liu nh gi.37.Hy ch ra tng quan gia gi tr nng lng Gbbs chun thc ca qu trnh in ly canc H2O (G

o1) v ca CH3COOH(G

o2).

a) Go1 = Go2 .

b) Go1 > Go2

c) Go1 < Go2.

d) Khng d liu nh gi.38.Xc nh nng H2CO3, HCO3

-v HCO3-2trong dung dch acid cacbonic 0,01M, nu

pH ca dung dch ny l 4,18.39. pH ca cc dung dch sau s thay i th no nu ta pha long dung dch 2 ln?

a) Dung dch HCl 0,2M.


17/29

b) Dung dch CH3COOH 0,2M.c) Dung dch cha 0,1 mol/lit CH3COOH v 0,1 mol/lit CH3COONa.

40.Hng no trong cc hng di y c sp xp theo th t tng dn ca pH trong ccdung dch c cng nng mol:

a) HCN - HF - HClO -HCOOH - CH2ClCOOH.

b) HNO3- HNO2- CH3COOH - HCN.

c) HCl - CH2ClCOOH - HF - H3BO3.d) H2SO4- HCN - HF - HCl - CH2ClCOOH

41. acid ca dung dch HCN 0,2N s thay i nh th no nu ta thm vo KCN cnng KCN 0,5 mol/lit?

a) Tng c) Khng thay i.b) Gim. d) Tng thm 0,5 ion-gam/l.

42.C bao nhiu ion H+ trong 1ml dung dch c pH bng 13?a) 1013.

b) 6,02.1013.

c) 6,02.107.

d) 6,02.1010.

43.pH ca nc s thay i th no nu ta thm 0,01 mol NaOH vo 10 lt nc:a) Tng 2 n v. c) Tng 4 n v.

b) Tng 3 n v. d) Gim 4 n v.

44.pH cadung dch trung tnh 50oC l bao nhiu?a) 5,5. c) 7,0.

b) 6,6. d) 7,5

45.T l gia nng ca ion hydro trong dung dch ca acid benzoic 1,00.10-3M trongnc v hng s phn ly ca acid l 99. Tnh hng s phn ly.46. Acid HX 0,150 mol/kg trong nc c phn ly l 7,3 %. Tnh nhit kt tinh v nhit si ca dung dch.47. Mt dung dch c cha 0,01 mol/lt KI, 0,10 mol/lit KBr v 0,10 mol/lit KCl . Cho t tdung dch AgNO3vo dung dch trn . Cht no s kt ta u tin?

a) AgI. d) C hai AgBr v AgCl .b) AgBr.e) Khng th bit c nh cc thng tin trn.c) AgCl .

Cho TAgI=1,5.10-16, TAgBr=3,3.10

-13, TAgCl= 1,8.10-10.

48. Dung dch amoniac 0,1M c cha clorua amoni c nng ion OH-l 3,6.10-6. Nng ion amoni s l bao nhiu ?

NH3 + H2O NH4+ + OH-

a) 0,50. d) 0,34.

b) 0,94. e) 0,74.

c) 0,64.49.Nng ca dung dch HNO3bng bao nhiu pH dung dch bng 3.a) 3 d) -3

b) - Antolog[3] e)Tt c u sai.c) 10-3

50. Ion no di y trong nc c th va ng vai tr acid ln baz Bronsted?a) HCO3

-. d) CN-.

b) SO42-. e) PO4-

3-.

c) NO3-.

51. Ha tan mt lng tha BaSO4trong nc. Tch s tan ca mui ny l 1.10-10. Nng

ion bari trong nc s l bao nhiu?

a) 10-

M.b) 10-5 M.

c) 10-6 M.

d) 10-

M.e) 10-20 M.


18/29

52. Xc nh tch s tan ca mui MX2nu dung dch bo ha cha 0,02 mol trong 100 mldung dch.

a) 0,20.

b) 0,0034.

c) 0,08.

d) 0,032.

e) 0,016.

53. Gi tr no di y gn vi pH ca dung dch NaOH 10-4M nht?

a) 11b) 10,2

c) 9

d) 7e) 4

53. Hng s phn ly ca EDTA (H4Y)nh sau:H4Y + H2O H3O

+ + H3Y- K1 = 1,02 .10

-2

H3Y- + H2O H3O

+ + H2Y- 2 K2 = 2,14 .10

-3

H2Y-2 + H2O H3O

+ + HY- 3 K3 = 6,92 .10-7

HY-3 + H2O H3O+ + Y- 4 K4 = 5,50 .10

-11

Tm biu thc xc nh nng chung Cy ca EDTA.f) Cy = [Y- 4] + [HY- 3] + [H2Y- 2] + [H3Y-] + [H4Y]g) Cy = [HY- 3] + [H2Y- 2] + [H3Y- ] + [H4Y]h) Cy = [Y- 4] + [HY- 3] + [H2Y- 2] + [H3Y- ]i) Cy = [Y- 4] + [HY- 3] + [H2Y- 2] + [H3Y- ] + [H3O+]

j) Cy = [Y- 4] + [HY- 3] + [H2Y- 2] + [H3Y-] + [OH-]55. Tnh nng ti thiu ca ion Br- cn thit kt ta AgBr t dung dch c nng ionAg+ l 1,0.10-5mol/lt. ( TAgBr= 4,0.10

-13).

a) 4,0. 10-10M d) 4,0. 10-11M

b) 4,0. 10-9M e) (40)1/2. 10-6M

c) 4,0. 10-8M

56. Hng s thy phn ca Al3+trong nc l 1,4. 10-5. Nng ion H3O+trong dung dch

AlCl3l bao nhiu?

a) (1,4. 10

-5

)

1/2

M d) 1,4. 10

-4

Mb) (1,4. 10-6) 1/2M e) Tt c u sai.c) (1,4. 10-4) 1/2M

57. Tnh pOH ca dung dch hnh thnh t s trn ln 70 ml dung dch NH3 0,1M v 60 mldung dich HCl 0,05M.

a) lg (1,8.10-5) - lg (0,03 / 0,04)

b) -lg (1,8.10-5) + lg (4,0 / 3,0)

c) -lg (1,8.10-5) + lg (0,004 / 0,003)

d) -lg (1,8.10-5) - lg (0,004 / 0,003)

58. Sp xp cc cht di y theo tng ca tnh acid: H3O+, H2O, H2, H3O

+, HSO4-v HF.

a) H2O < HF < H2 < H3O+ < HSO4

-

b) HF < H2O < H2 < HSO4-

< H3O+

c) H2 < HF < H2O < H3O+ < HSO4

-

d) H2 < H2O < HF < HSO4- < H3O

+

e) H2O < H2 < H3O+< HF < HSO4

-

59.Nng ion H+l bao nhiu trong dung dch KOH 0,0020 M?a) [H+ ] = Kw / [0,0020]

b) [H+ ] = Kw . [0,0020]

c) [H+ ] = [0,0020] / Kw

d) [H+ ] = -log { Kw / [0,0020]}

e) Khng c cu no ng c.60. Hng s thy phn ca phn ng NH4 + H2O NH3 + H3O

+ l 5,6. 10-10 25oC.

pH ca dung dch NH4 Cl s gn vi gi tr no nht?a) 4 d) 5,5.

b) 5 e) 4,5


19/29

c) 6

61. Mt dung dch m cha NaHCO3 , H2CO3 c pha sao cho pH=7. T l nng gia[NaHCO3 ]/ [H2CO3] l bao nhiu nu bit hng s phn ly ca acid ny l 4,3 . 10

-7.

a) 43. d) 86.

b) 4,3. e) 1,29.

c) 0,43.

62. Dung dch A cha NaHCO3, vi nng mi cht l 0,1 mol/lit. Cho 0,01 mol HCl vo 1lt dung dch ni trn. pKaca H2CO3 l 6,37. pH ca dung dch hnh thnh s gn vi gi trno nht?

a) 6,37 d) 4,35

b) 6,28 e) 2,10

c) 5,84

63.Cho 50 ml dung dch Na2SO41M vo dung dch cha ion Ba+2th bt u xut nin kt

ta suynfat bari. Th tch cui cng ca hn hp l 500 ml. Tch s tan ca BaSO4l 1 . 10-10.

Nng ca Ba2+trong dung dch ban u l bao nhiu?a) 5,0 x 10-9M d) 1,0 x 10-9M

b) 2,0 x 10-9M e) 1,1 x 10-9M

c) 9,0 x 10-9M64. Ta c dung dch cha ion Ag+v ion Ca+2vi nng tng ion l 0,01M. kt ta chnlc ion bc ta cn thm ion no vo?

a) SO42-( TCa SO4 = 2,4 x 10

-5, T Ag2 SO4 = 1,2 x 10-5)

b) OH - ( TCa (OH)2 = 1,3 x 10-6, T AgOH = 2,0 x 10

-8)

c) PO43-( TCa3 (PO4)2 = 1,3 x 10

-32, T Ag3PO4 = 1,8 x 10-18)

d) Bt k ion no trong s trn u c.e) Khng ion no c.

65. Acid oxalic HOOC-COOH c pKa1 = 1,23 v pKa2 = 4,19. Gi s ta c dung dchacidoxalic. pH no th nng dng [HOOC-COO- ] s ln nht?

a) 1,23 d) 2,71

b) 4,19 e) 14,0.c) 7,55

Bng 1.4:

Hng s in ly ca mt s axit trong nc 25oC

Cht inly

Phng trnh in ly Ka

C6H5COO

H

C6H5COO

H

C6H5COO- +

H+

6,3.10-5

C6H5OH C6H5OH C6H5O-+ H

+ 1,3.10-10

CH3COOH

CH2ClCOO

H

CH3COOH

CH2ClCOO

H

CH3COO-+

H+

CH2ClCOO-+

H+

1,75.10-5

1,38.10-3

H2B4O7 H2B4O7

HB4O7-

H+ + HB4O7-

H+ + B4O7-2

K1 = 1,8.10-

4

K2 = 2,0.10-

8


20/29

H2C2O4 H2C2O4

HC2O4-

H+ + HC2O4-

H+ + C2O4-2

K1 = 5,6.10-

2

K2 = 5,4.10-

5H2CO3 H2CO3

HCO3-

H+ + HCO3-

H+ + CO3-2

K1 = 4,5.10-

7

K2 =4,7.10-

11H2CrO4 H2CrO4

HCrO4-

2HCrO4-

H+ + HCrO4-

H+ + CrO4-2

Cr2O7-2 +

H2O

K1 =1,8.10-1

K2 =3,2.10-7

3,0.10-2

H2S H2S

HS-

H+ + HS-

H+ + S-2

K1 =1.0.10-7

K2=2.5.10-

13H2O2 H2O2 H+ + HO2

- K1=2,0.10-

12H2S2O3 H2S2O3

HS2O3-

H+ +

H2SO3-

H+ + S2O3-

2

K1=2,5.10-

11

K2 =1,9.10-2

H2SeO3 H2SeO3

HSeO3-

H+ +

HSeO3-

H+ + SeO3-2

K1

=1,8.10-3

K2 =3,2.10-9

H2SeO4 H2SeO4

HSeO4-

H+ +

HSeO4-

H+ + SeO4-2

K2 =8,9.10-3

H2SO3 H2SO3

HSO3-

H+ + HSO3-

H+ + SO3-2

K1 =1,4.10-2

K2 =6,2.10-8

Cht inly

Phng trnh in ly Ka

H2TeO3 H2TeO3

HTeO3-

H+ + HTeO3-

H+ + TeO3-2

K1 =2,7.10-3

K2 =1,8.10-8

H2TeO4 H2TeO4

HTeO4-

H+ + HTeO4-

H+ + TeO4-2

K1 =2,5.10-3

K2=4,1.10-

11


21/29

H3AsO4 H3AsO4

H2AsO4-

HAsO4-2

H++ H2AsO4-

H++ HAsO4-2

H++ AsO4-3

K1 = 5,6.10-

3

K2 = 1,7.10-

7

K3= 2.9.10-

12H3BO3 H3BO3

H2BO3-

HBO3-2

H++ H2BO3-

H++ HBO3-2

H+ + BO3-3

K1 = 7,1.10-

10

K2 = 1,8.10-

13

K3 = 1,6.10-

14H3PO3 H3PO3

H2PO3-

H+ + H2PO3-

H+ + HPO3

-2

K1 = 3,1.10-

2

K2 = 1,6.10-

7H3PO4 H3PO4

H2PO4-

HPO4-2

H+ + H2PO4-

H+ + HPO4-2

H+ + PO4-3

K1 = 7,1.10-

3

K2 = 6,2.10-

8

K3= 5,0.10-

13H

4P

2O

7 H

4P

2O

7H3P2O7

-

H2P2O7-2

HP2O7-3

H+

+H3P2O7

-

H++ H2P2O7-

2

H+ + HP2O7-

3

H+ + P2O7-4

K1 = 1,2.10-

1

K2 = 7,9.10-

3

K3 = 2,0.10-

7

K4 = 4,8.10-

10HBrO HBrO H+ + BrO- 2,2.10-9

HBrO3 HBrO3 H+ + BrO3- 2,0.10-1HClO HClO H+ + ClO- 3,0.10-8

HClO2 HClO2 H+ + ClO2- 1,1.10-2

HCN HCN H+ + CN- 4,9.10-10

HCNS HCNS H+ + CNS- 1,4.10-1

HCOOH HCOOH HCOO -+ H+ 1,8.10-4

HF HF H+ + F- 6,2.10-4


22/29

Bng 1.5:

Hng s in ly ca mt s baz trong nc 25oC

Baz Phng trnh in ly KbAmonium

Anilin

Benzidine

Ethylamine

Hidroxilami

n

Methylamin

Oxiquinolin

e

Piridine

Ur

UrtrpinQuinoline

NH4OH

C6H5NH2 +

H2O

(C6H4)(NH2)2+ H2OC2H5NH2 +

H2O NH2OH +

H2OCH3NH2 +

H2O

C9H7ON+

H2O

C5H5N + H2OCO(NH2)2 +

H2O

(CH2)6N4 +

H2O

C9H7N + H2O

NH4+

+ OH-

C6H

5NH

3

+ +

OH-

(NH2)(C6H4)(NH3)++

OH-

(C6H4)(NH3)2++OH

-

(C2H5NH3)+ + OH

-

NH3OH+ + OH

-

CH3NH3+ + OH

-

C9H7ONH+ + OH

-

C5H5NH+ + OH

-

(NH2)CO(NH3)+ +

OH-

C9H7NH+ + OH

-

1,8.10-

4,2.10-

10

9,3.10-

10

5,6.10-

10

4,7.10-4

9,6.10-9

4,8.10-4

1,0.10-9

1,5.10-9

1,5.10

-

14

1,4.10-

14

6,3.10-

10


23/29

Bng 1.6

Tch s tan ca cht in ly t tan.Cht in ly Nhit ( oC) TAgBr

AgCl

Ag2CrO4Ag2Cr2O7AgI

Ag2SO4

BaCO3BaSO4

CaCO3

Ca(COO)2

Ca(OH)2CaSO4Cu2Br2

CuCO3Cu2Cl2

Cu2I2

FeCO3

Fe(OH)2

Fe(OH)3

Hg2Cl2

HgO

KClO4

MgCO3.2H2O

Mg(OH)2Mn(OH)2

NiCO3

PbCl2PbI2

ZnCO3Zn(COO)2Zn(OH)2

25

25

2525

25

25

25

25

25

25

25

25

25

2525

25

25

18

18

25

25

25

25

25

18

25

25

25

18

25

20

6,3.10-

1,56.10-10

4,05.10-122,0.10-7

1,5.10-16

7,7.10-5

7,0.10-9

1,08.10-10

4,8.10-9

2,57.10-9

3,1.10-5

6,26.10-5

5,3.10-9

2,36.10-101,8.10-7

1,1.10-12

2,11.10-11

4,8.10-16

3,8.10-38

1,1.10-18

1,7.10-26

1,07.10-2

1,0.10-5

5,5.10-12

4.10-14

1,35.10-7

1,7.10-5

8,7.10-9

6,0.10-11

1,35.10-9

4,0.10-16

BI TPCHNG II + III

4. Tnh hng s cn bng ca cc phn ng ion da trn H, S sinh thnh ca cc ion trongdung dch.

Cu2+ + Zn Cu + Zn2+

H+ + OH- H2O

Fe3+ + I- Fe2+ + I2

5. Vit chu trnh kn xc nh entalpy hydrat ha ca ion Mg2+da trn cc s liu sauy:

Entalpy thng hoa ca Mg: +167,2 kJ/mol.

Th ion ha th nht ca Mg: 7,646 eV

Th ion ha th hai ca Mg: 15,035 eV


24/29

Entalpy phn ly ca Cl2: +241,6 kJ/mol.

Ai lc in t ca Cl: -3,78 eV

Entalpy ha tan ca MgCl2: -150,5 kJ/mol.

Entalpy hydrat ha ca Cl-: -383,7 kJ/mol.

-1892,2 kJ/mol6. Tnh entalpy hydrat ha ca ion CaCl2bit nng lng mng tinh th ca CaCl2 l2255kJ/mol, Entalpy hydrat ha ca Cl-: -383,7 kJ/mol.

-1568,9 kJ/mol

11.Chng minh rng lc ion ca KCl, MgCl2, FeCl3, Al2(SO4)3v CuSO4lin h vi nng molan bi cc biu thc sau: J(KCl) = m, J(MgCl2) = 3m, J(FeCl3) = 6m, J(Al2(SO4)3) = 15mv J(CuSO4) = 4m.

12.Tnh lc ion ca dung dch cha ng thi KCl v CuSO4vi nng tng ng l 0,10v 0,20 mol/kg.

(0,90 mol/kg)

13.Tnh nng ca dung dch cha K3[Fe(CN)6] 0,040mol/kg, KCl 0,030 mol/kg v NaBr0,050 mol/kg.

(0,320 mol/kg)

14.Tnh khi lng a) Ca(NO3)2ringbit, b) NaCl cn thit phi thm vo dung dch KNO30,150 mol/kg trong nc v cha 500 gam dung mi lc ion c gi tr l 0,250 mol/kg.

a) 2,73 g b) 2,92 g

15.Dung dch CuSO4phi c nng bao nhiu c lc ion bng vi dung dch KCl 1,00mol/kg.

0,250 mol/kg

16.Hy a ra biu thc tnh h s hat ion trung bnh ca CaCl2t h s hat ca ccion ring bit.

f= (f+.f-2)1/3

17.S dng php gn ng th nht Debye - Hckel tnh h s hat ion trung bnh caCaCl2trong dung dch cha CaCl20,010 mol/kg v NaF 0,030 mol/kg.

0,56

18.H s hat ion trung bnh ca dung dch La(NO3)30,500 mol/kg o c bng thcnghim l 0,303 25oC. Tnh sai bit ( tnh theo %) ca php gn ng th nht Debye -Hckel so vi thc nghim.

1.102 %

19.H s hat ion trung bnh ca ba dung dch HBr trong nc 25oC o c l 0,930 (5,0 mmol/kg); 0,907 ( 10,0 mmol/kg) v 0,879 ( 20,0 mmol/kg). Tnh hng s A trong phpgn ng th hai Debye - Hckel.

2.03

20.H s hat ion trung bnh ca dung dch NaCl trong nc 25oC c cho trong bngsau. Chng minh rng cc s liu sau tha mn php gn ng th nht Debye - Hckel.

m

(mmol/kg)

1,0 2,0 5,0 10,0 20,0


25/29

f 0,9649 0,951

9

0,927

5

0,902

4

0,871

2

T cc s liu trn p dng php gn ng th hai Debye - Hckel, hy tnh hng s A.

11. Chng minh rng ha tan ca dung dch cht in ly t tan 1:1 lin h vi tch s ionbi biu thc

s T es

1 2 1 17/ .

12. Cht in ly t tan MX c tch s tan l T, ha tan l s. Chng minh rng trong dungdch cht in ly mnh NX nng C phn ly hon ton th ha tan ca MX s l

s C T C' ( ) 1

242

v s T

C' khi T nh.

Cho rng dung dch trn l dung dch l tng.

12. Chng minh rng, nu lc ion ca dung dch cha ng thi cht in ly t tan MX vcht in ly mnh NX c quyt nh bi nng C ca cht in ly mnh, v dung dchny tun theo php gn ng th nht Debye - Hckel; th ha tan s trong hn hp ctnh theo biu thc:

s T

Ce

h C'

,

4 61

13. ha tan ca clorua bc trong nc 25oC l 1,274.10-5mol/kg. Ap dng php gnng th nht Debye - Hckel hy tnh: a)Nng lng Gibbs chun thc ca phn ng ha tanAgClAg+ + Cl-; b) ha tan ca AgCl trong dung dch K2SO40,200M.

55,9 KJ/mol, 1,7.10-5mol/kg

14. Ap dng php gn ng th nht Debye - Hckel hy tnh phn ly ca acid acetic trongnc 25oC ng vi nng acid l 0,100 mol/kg.

1,4 %

15. Cho dung dch HCl 0,100M. S dng php gn ng th nht Debye - Hckel hy tnh pHca dung dch trn.

1,2

16. H s hat ion trung bnh ca dung dch KCl 3,00.10 -3mol/kg v BaCl21,00.10-3 ln

lt l 0,94 v 0,88. Ch s dng cc d kin m bi cho, hy tnh h s hat ca ionBa2+.

0,77

17. S dng php gn ng th nht Debye - Hckel hy tnh hat ion trung bnh ca dungdch HCl, KCl, ZnCl2trong cc dung dch tng ng v so snh kt qu l thuyt vi nhnggi tr thc nghim thu c t bng sau:

Nng fthc nghim

mol/kg HCl KCl ZnCl2

1,00. 10-3

5,00. 10-3

1,00. 10-2

0,9660,928

0,904

0,9660,927

0,902

0,8810,780

0,731


26/29

2,00. 10-

5,00. 10-3

1,00. 10-1

2,00. 10-1

0,876

0,830

0,796

0,766

0,862

0,816

0,770

0,718

0,666

0,578

0,515

0,459

Hy xc nh xem php gn ng th nht Debye - Hckel c th p dng khong nng

no?18. S dngphp gn ng th hai ca Debye - Hckel hy tnh hat ion trung bnh cacc dung dch HCl 0,100M , MgCl20,100M v ZnSO4 0,100M.

0,754; 0,16; 0,436

19. Tnh lc ion ca dung dch BaCl20,01 M?

a) 0,03 b) 0,04 c) 0,01

d) 0,02 e) 0,00

20. Tnh lcion ca dung dch cha H2SO4 0,01M v CH3COOH 0,01 M?

a) 0,03 b) 0,04 c) 0,01

d) 0,02 e) 0,06

BI TP CHNG IV

2. Trnh by nh hng ca nhit n dn in ca kim loi v dn in ca dungdch in ly. So snh v gii thch.

3. o dn ca cc dung dch khc nhau bng cng mt bnh o dn. Dung dch KCl0,050M cho in tr 243 om. Dung dch NaOH 0,010M cho in tr 681 om. Tnh dnin ring v dn in ng lng ca dung dch NaOH 0,010M. Bit dn in ring

ca dung dch KCl 0,05M l 6,67.10-3om-1cm-1.

3. dn in ring ca dung dch acid propionic C2H5COOH 0,010M l 1,41.10-4 om-

1cm-1, dn in ng lng cc i ca acid ny l 385,6 om-1cm2lg-1. Tnh phnly va acid propionic trong dung dch trn. Tnh hngs phn ly ca acid trn.

4. Chng minh rng trng thi cn bng ca cu Weston ta c h thc: R1:R3= R2 :R4

5. dn in ti hn ca dung dch picrat kali l 103,97 om -1cm2lg-1 v linh ionca ionkali l 73,58 om-1cm2lg-1 . Tnh linh v s ti ca ionpicrat trong dung dch v cnglong.

6.Barinski, Symanski v Betto xc nh ha tan ca phc t tan Co 2Fe(CN)6bng cch o dn in ca dung dch bo ha. dn in ring ca dung dch bo ha l 2,06. 10-6 om-1 cm-1, ca nc c dng pha dung dch l 4,1. 10-7 om-1 cm-1. Linh ca ionCo2+ vFe(CN)6

- 4 tng ng l 43 v 111 (om-1cm2lg-1). Tnh ha tan ca phc trn.

7. dn in ng lng ca clorua bc cc nng khc nhau c cho trong bn gsau:


27/29C1/2

o

C. 10 (mol/l) 0,10256 0,13694 0,29782 0,32500

(S.cm2lg-1) 123,43 122,94 121,14 120,95

Tm dn in ng lng ti hn ca dung dch trn.

8.Dung dch LiX 0,1000M c dn in ring l 0,009000 S.cm-1 25o C. Linh ca ionLi+l 39,5 S.cm2lg-1.

a) Tnh dn in ng lng ca dung dch.

b) Tnh linh ca anionX-.

9. in phn dung dch ca cht in ly mnh AB vi cng dng 0,100 ampe vi thigian 9650 giy. Phn ng in cc l:

A A+ + e

A+ + e A

Nng molan ca dung dch ban u l 0,1. Sau khi in phn kt qu phn tch anolitcho thy c 0,0165 mol AB trong 100 gam nc. Tnh s ti ca cc iontrong dung dch trn.

10. Th nghim kho st dn ca iodate kali ( KIO3) cho cc kt qu sau:

C 103mol/l / S.cm2lg-1 C 103mol/l / S.cm2lg-1

0,18265

0,35295

0,70430

0,99845

113,07

112,61

111,91

111,45

1,7117

2,5362

3,2859

3,9118

110,55

109,78

109,19

108,78

Tnh dn in ti hn ca KIO3.

11. Brnsted nghin cu dn ca dung dch nitramide nhit 15oC v thu c cckt qu sau y:

C (mol/l) 0,030 0,015 0,0075 0,00375 0,001875

o(om-1cm2lg-1) 1,017 1,446 2,052 2,89 4,053

oH+=298, oNa+=39,9,

oNaHN2O2= 298 (om

-1cm

2lg-1). Tnh hng s phn ly ca nitramideng vi phng trnh phn ly sau:

H2N2O2 H+ + HN2O2

-

12. Pht biu nh lut Kohlrausch v s ph thuc ca dn in vo nng . nh lutny p dng cho dung dch loi no?

p dng nh lut ny hy trnh by phng php xc nh dnin cc i ca KClda trn nhng s liu thc nghim sau y:

10 .C, mol/l 10,0 5,00 2,00 1,00 0,200 0,100

, S.cm2.mol-1 122.4 124.4 126.2 127.3 128.8 129.1

13. Ion no di y c tc chuyn ng tuyt i ln nht?

a) Be2+ c) Rb+ e) Ca2+

b) Mg2+ d) H+


28/29

14. ng di y biu din s ph thuc gia o(S.cm2mol-1) vo C (mol/lit)1/2. dc

ca ng thng trn cho ta gi tr:

a) dn in mol cc i o.b) H s Kohlrausch.c) dn in mol.d) Hng s bnh.e) in tr ring .

15. Tnh dn in cc i oca NH4 OH. Bit dn in cc i oca cc cht NH4Cl,NaOH, NaCl tng ng l 150, 248 v 127 om-1cm2mol-1.

a) 525 c) 271 e) 121

b) 29 d) 98

16. dn in ring ca nc tinh khit l 7.10-8om-1cm-1. dn in mol ca nc l:

a) 1,26.10-6 b) 1,26.10-9 c) 3,89.10-6

d) 3,89.10-11 e) Khng c cu no ng c

17. Dung dch NaOH 0,020N ( = 0,15 om-1m-1 ) c dng xc nh hng s in cc.in tr o c l 680 om. Tnh hng s in cc .

a) 0,15 / 680 d) 0,02 . 680

b) ( 0,15 . 0,02 ) / 680 e) 1 / ( 0,15 . 680)

c) 0,15 . 680

18. dn in ca acid formic nng 0,0250 M l 8,27.10 -4S.cm-1. Tnh pKa. Cho rng

dung dch trn l dung dch l tng.

19. dn in ring ca acid suynfuric 4% l 0,168 S.cm -1. T trng ca dung dch l 1,026.

Tnh dn in ng lng ca dung dch.

20. dn in ca acid propionic nng 0,135 M l 4,79.10-2S.m-1. Tnh pH ca dungdch, pKaca acid. Cho rng dung dch trn l dung dch l tng. Bit -= 37,2 S.cm

2lg-1.

21. Tnh dn in ng lng ca dung dch etilamin C2H5NH3OH pha long 16l/mol. Bit dn in ng lng ti hn l 232,6 S.cm2lg-1. dn in ring ca dungdch trn l 1,312.10-3S.cm-1. Nng ionOH-, phn ly, hng s phn ly l bao nhiu?

22. Hng s phn ly ca acid maleic l 1,54.10-5mol/l. Tnh phn ly, nng ionH+ pha long 1024 l/mol. Bit dn in ng lng trong dung dch trn l 41,3 S.cm2lg-1.Tnh dn in ng lng ti hn.

23. dn in ring ca dung dch MgCl25% l 4,38 S.m-1. T trng ca dung dch l 1,039.Tnh dn in ng lng v phn ly biu kin ca dung dch. Bit Mg2+= 44,6 vNO3-= 62,6 S.cm

2lg-1.

24. dn in ring ca dung dch CH3COOH 5,00.10-2M l 3,24.10-2S.m-1. dn in

ring ca dung dch CH3COONa 5,00.10-2M l 7,75.10-4S.m-1. Tnh hng s phn ly ca acid

acetic, cho rng mui phn ly hon ton.

25. Tnh dn in ring v dn in ng lng ca dung dch CuSO40,050M. Bitrng nu thit din in cc l 4 cm2v khong cch gia chng l 7 cm th in tr o cl 230 om.

26. dn in ring ca dung dch KI l 89,0 S.m-1

. dn in ring ca dung dch KCll 186 S.m-1. T hai dung dch trn pha dung dch cha ng thi hai mui c dn inring l 98,5 S.m-1. Tnh phn trm ca mi dung dch ban u trong hn hp.


29/29

27. in phn dung dch HCl tnh s ti. Lng ion Cl- trong catolit trc v sau inphn tng ng l 0,177 v 0,163 iongam. Trong culng k bc mc ni tip lng Ag giiphng trn catod tng ng vi 0,083 iongam Cl-. Tnh s ti ca H+v ionCl-.

28. S ti ca anion trong cc dung dch NaCl 0,1M, KCl 0,1M, NaBr 0,1M ln lt l 0,603,0,504, 0,605. xc nh s ti ca cc ion trong dung dch KBr 0,1M. Cho rng cc dung dchtrn l dung dch l tng.

29. Bng sau cho cc cp gi tr dn in ng lng v nng ca dung dch KNO 3.Tnh dn in ng lng ti hn.

10 .C, mol/l 0,500 1,00 5,00 10,0 50,0 100

, S.cm2.mol-1 124.4 123,6 120,5 115,8 109,9 104,8

30. dn in ring ca dung dch KCl 0,500 M 18 oC l 5,12 S.m-1. H s nhit ca dn in ring l 0,0208 K-1. Tnh dn in ng lng ca dung dch 25oC.

31. 18oC vn tc chuyn ng tuyt i ca ion H+ v ion valeric C5H9O2-l 3,242.10-4 v

2,662.10-4cm2V

-1s

-1. H s nhit ca vn tc tng ng l 0,0154 v 0,0244 K-1. Tnh dn in ng lng ti hn ca dung dch acid valeric 25oC.

Documents

Baitap điện hóa học