Conductometric Analysis - PowerPoint PPT Presentation

1 / 66
About This Presentation
Title:

Conductometric Analysis

Description:

Conductometric Analysis conductometry ... – PowerPoint PPT presentation

Number of Views:213
Avg rating:3.0/5.0
Slides: 67
Provided by: 2209
Category:

less

Transcript and Presenter's Notes

Title: Conductometric Analysis


1
??? ????? ?????
2
?????
  • Conductometric Analysis

3
  • ?????(conductometry )???????????????????

?????????????????
4
  • ?????
  • ??????????
  • ???????????
  • ?,?????????
  • (???)???????
  • ??????
  • ??????
  • ?????????????????????????????????????????

5
  • ?????
  • ???????????????????????????

6
1 ????
  • ????????
  • 1. ??????
  • ?????????
  • ???????????????

7
  • ????????????????????,?????,?????????
    ??????????????????????(???)?????????

??????????????????
8
2. ??????
  • ????

G ?/ ?
??? ?????? ??S ? m-1
?? ????? S, 1S1?-1
??????????????????(1cm),???????(1cm)??????????
9
3. ????????
?? ??? ????? ??????
  • ????????

???????? ??, ??? ???????? ?,?????
???, ???
  • ????????????
  • ??????,????????, ???
  • ????????????

10
??????
  • 1. ??
  • ????1cm???????????????1
    mol????????????????,?????????,?????m??.
  • 2. ????
  • ????C molL-1???Vcm3???l mol,?
  • ?m ?V
  • ?m 1000 ? / C
  • ?m????Scm2mol-1

11
3. ????
  • ????????
  • ????????
  • ??????, ???

???????????
12
??????????????? ???????,??????? ????????????,?
1mol(KCl)
1mol(1/2CuSO4)
?????????,???? ????????
????????????????????
13
??????????
?? 1000 ? / C ??, C ??,???,?????????(????)?,???
???
1. ?? ????????????,???????,?
??? 2. ????????

??????,?????????,????????????????,?????
?????????????????????????????????????
14
????
  • ???????????????????,?????????????????????????????
    ??????????
  • ??????????? ????

15
??? L0/(Scm2mol-1) ??? L0-/(Scm2mol-1)
H 349.82 OH- 197.6
Li 38.69 Cl- 76.34
Na 50.11 NO3- 71.44
Ag 61.9 HCO3- 44.48
K 73.52 IO3- 41
NH4 73.4 CH3COO- 40.9
Tl 74.7 C6H5COO- 32.3
½Ba2 63.64 ½CO32- 69.3
½Ca2 59.5 ½C2O42- 74.2
½Mg2 53.06 ½SO42- 79.8
16
????25????????
17
??????????????
D???? ?????? T???? A,B????????????
18
???????
  • ???????,????????????????

1.??? ????????,????? ??????????????
??????????????,????,?????,???????????????

19
????? A???? l ????
???cm-1 ???KCl??????(??)???????????
20
2.???????
???????????????(???????????????????????,????
???????,???????????,????????,????.
610V,50Hz?????,??????? ??,??10002500Hz????
????????????????????????
21
(1)????? ?????????????
22
  • (2)???
  • ?????????(??????)
  • ???? ????? ????
  • ? ?????

23
??????????
??????????,???????? ????,??????????????, ??,?
?????????????? ??????????????????????
24
  • 1. ????
  • ?????????????????????????????????????????
    ??????

25
  • 2.????????
  • 3.??????????
  • 4.???????

26
?????????
?????? ????????????,?????????
?????? ????????????? ????????
27
????????????????????????
28
??????
  • ???????,????????????????,????????????????????,????
    ???????,????????????.
  • ???????????????????????(K10-10),????????????,????
    ?????????????????.??????????????????????.
  • ???????,?????????????

29
?????
  • Coulometry Analysis

30
  • ???? ?(coulometry)
  • ?????????????????,???????????????????????????????
    ?????????
  • ???????????(?????????????)????????(???????)
  • ????????100(???????????????????????,??????????)

31
????????
  • 1.??
  • ??????????????,?????????????,?????????,?????????

32
(?)????? (1)????????? ????
?????(??)???(??) ??????(??)???(??)
33
(No Transcript)
34
???? ???? ??(??) ??(??)
35
(No Transcript)
36
????(???????)
???????,??????,???????????
????Cu2 2e Cu? ????2H2O O2 ? 4H
4e ???? 2Cu2 2H2O 2Cu O2 4H
??????E 0.307 - 1.22 -0.91 (V)
37
1.?????????
  • ?????????????????????,????????,?????????????????
    ???????????,??????,??????????????,????????????????
    ?????????(E?),???????????(U?)?

38
  • ??????????????????????????????????????????
  • ????????????????????,??????????(E?)???,??????
    ??,????????????
  • ??????U??
  • U?E?
  • U?-U?iR

39
  • ???????????????????????????????????????????,
    ????????????????????
  • ????????????,???????????????,?????????????????
    ?????,???????????????

40
  • ????,???????,????
  • ????,???????,?????

41
  • ????????????
  • ????????????? ?????????,????????????
  • U?E?(?)-E?(?)

42
1. ?????? ?????????,?????,???????????(D'?)
? 2. ??????(????) ??????????????,??????????(D
?)? 3. ???????
???(?)?????????(iR)???????????
E? (E? ??)- (E? ??) iR
??????????????????????????,????????????
43
  • 2.????????
  • ??????????????????????,??????????????????????????
    ,????????????
  • ??????????,?????????????????????
  • ???????????????

44
???????????? ???????,??????????,????????
??????? ???? ??????,????????????????,??????
?
????????? a.????,?????? b.??,?????
45
????? ?????????????????
????????????,????????????
46
  • ????????
  • (1) ????
  • ???????????????????,?????????,?????????????25?,??
    ???10mA/cm2?,??????????1.09V,?????1.04V,???????0.7
    8V,??????0.58V?

47
  • (2)????(???????????)
  • ???,??????,?????????,????,???????1?10?100mA/cm2?
    ,???????????0.19?0.58 ? 0.85V?

48
  • (3)??????
  • ????,???????????????,????????????????,??????????
    ???????????,??,????????????????,???????????,??????
    ??????

49
  • (4)??
  • ????????????????,?????10?,???????2030mV?

50
???????????
1. ???? ???????
?????????????W???????Q???? ???????
??M????????(g),Q???(1??1??1?),F??????(1F96487?
?),n?????????????
51
  • ??????,????????,?
  • Faraday???????????????????????????????,????
    ?????????

52
????
(1)??????? (2)??????????
(3)????? (4)???????? (5)?????
53
2.?????
(1)???,?????????N2????????????,???????
(2)?????????????????,?????????????????????,????
??????????????????
54
???????????
  • ????????,??????????????????????,?????????,??
    ???????????????,??????100,??????????????????

55
????? (1)????? (???) 1F??????11200 mL
?? 5600 mL ??? 16800
mL?? (2)?????? (?????) ?????,???????,
???Cu????Q i ? t (3)?????
56
?????the quantity of electrical charge
??? Q i ? t ????????????? ???
?lgit ?t ??,?? k??lg i0 ??????100
57
??????????
????????,?????????????(?????,?????????????)???
??????,???????????????????????????????????????????
?????????
1. ??????? (1)???????? (2)??????????????,?????
??????????
(3)????????????????? (4)?????????????10-5-10-9
g/mL
58
  • 2.????
  • (1)????
  • ??????????????
  • (2)????
  • ???????????????????????

59
3.??????????
?? (1)????????? (2)????? (3)?????
(1) ???? ????H2O (1/2)O22H 2e
????2 H2O H2 2OH- -2e (2) ???? ????AgAge
(PbPb22e) (3) ???? ???? HgY2e
HgY4- (4) ?????? ???? 2Br - Br22e
2I- I22e
60
??????
61
??????automated coulometric titration
1. ??????????????? ?????1200
C????,???CO2??????????,?????? Ba(ClO4)
2 H2O CO2 ? BaCO3? 2HClO4 ??????????,??
??,?????OH - 2H2O 2e ? 2OH- H2
(????) ???????????,????? ?????????OH
- ????? HClO4? 2?????????1????? ????????????????
62
2. ???????????
?????(COD)??????????????????1dm3?????????(
????????)???????? ??????????COD?????
?????????????????????,?????????,??????????????
?? 5Fe2 MnO4- 8H Mn2 5Fe3
4H2O ??????????????,?????????????,??????C
OD?
63
3. ??????????
?? I2 2e ? 2I-
?? 2I- ? I2 2e
SO2 I2 2H2O ? SO42- 2I- 4H
CO22H 2e ? C H2O
64
4.?????(??????)
?? ?? ?? ??,??,?? ???????
( ???Ag??) ?Ag??????E?, ????E?, ?
E? E? , ? ?E 0, I?? 0,
???????
65
1.??????
??Cl-??????????, ?Ag????AgCl,Ag??? , ? E? ? E?
, ?E ? 0,????????? ????????E ????I
?????. ???(???)?????Ag ?Ag e ????????????
Ag Cl- ? AgCl? ?Cl-???????,???????????E?,?????
?? ????Cl-?????,Ag?????,?????????????????Ag?
??????? E? E? , ?E 0,?I??
0,??????? ??????????????,?????????
66
2.????(Karl Fisher)??????
??????I2 ??SO2 ?,????????
I2SO22H2O 2HIH2SO4 ?????????,??????. ???????
???????????????????????
(1)???????HI (2)?????????
??????? 1?g???10.722??????
Write a Comment
User Comments (0)
About PowerShow.com