() - . , , , , , . , .
. .
, . m ΔG. , ,
m = ΔG = RTln K RTln , (1)
, ; , .
, , ()
m = nFE = ΔG, (2)
n , , F , /( ).
(1) (2), :
= , (3)
= , , .
- (Pt, Au .), . , - , .
Pt | Sn4+, Sn2+||Fe3+, Fe2+| Pt. (4)
-
, (5)
z1+, z1 , ; z2+, z2 .
.
= . (6)
.
-
, (7)
aOx , aRed .
|
|
i- ai mi gi, ai = gimi (7)
, (8)
mOx gOx , ; mRed gRed , .
i- :
lg gi = Azi2 , (9)
I = ; A ; mi i- ; zi i- .
(9),
. (10)
(8)
. (11)
(11), φ (I), , . , φ (I) . φ (I) , φ(I) , (.1). - .
. 1. (11)
-
Pt | [Fe(CN)6]3-, [Fe(CN)6]4- . (12)
1. - , K3Fe(CN)6 K4Fe(CN)6. 0,01 0,001 /3 , . K3Fe(CN)6 K4Fe(CN)6 . .
2. (. .2) - (, )
Ag | AgCl, 1 || [Fe(CN)6]3, [Fe(CN)6]4 | Pt. (13)
- .
3. , - .
.2. .
1 - ; 2 ; 3 ;
4
1. ,
= , (14)
- .
2. I.
3. φ(I) .
4. φ(I) φ/.
5. φ/ = , .
|
|
.
1. .
K3Fe(CN)6, /3 | K4Fe(CN)6, /3 | , | φ/ , | I | φ/, | ||
φ/ .
.
1. ?
2. .
3. ?
4. .
5. .
6. , ?
7. ?
8. ?
9. ?
10. .
11. .
12. .
13. .
14. .
15. .
8