Стандартные ов-потенциалы в водных растворах

Полуреакция

Е°,В

Полуреакция

Е°,В

Ag

Ag⁺+eAg

+0.80

N

NO₃^+2H⁺+eNO₂+H₂O

+0.78

Al

Al³⁺+3eAl

-1.66

NO₃^+H₂O+2eNO₂^+2OH^

+0.01

As

H₃AsO₄+2H⁺+2eHAsO₂+2H₂O

+0.56

NO₃^+2H⁺+2eNO₂^+H₂O

+0.94

Au

Au³⁺+3eAu

+1.50

NO₃^+4H⁺+3eNO+2H₂O

+0.96

Br

Br₂+2e2Br^

+1.09

NO₂^+H₂O+eNO+OH^

 0.46

HBrO + H⁺ + 2e  Br^- + H₂O

+1.34

NO₂^+2H⁺+eNO+H₂O

+0.99

Cl

Cl₂+2e2Cl^

+1.36

O

O₂+2H⁺+2eH₂O₂

+0.68

2ClO₃^+12H⁺+10eCl₂+6H₂O

+1.47

O₂+4H⁺+4e2H₂O

+1.23

ClO₃^+6H⁺+6eCl^+3H₂O

+1.45

O₂+2H₂O+4e4OH^

+0.401

ClO₄^+8H⁺+8eCl^+4H₂O

+1.38

O₂+2H₂O+2eH₂O₂+2OH^

 0.076

Co

Co³⁺+eCo²⁺

+1.81

H₂O₂+2H⁺+2e2H₂O

+1.78

Cr

Cr₂O₇^2+14H⁺+6e2Cr³⁺+7H₂O

+1.33

Pb

Pb²⁺+2ePb

 0.13

CrO₄^2+4H₂O+3eCr³⁺+8OH^

 0.13

PbO₂+4H⁺+2ePb²⁺+2H₂O

+1.456

CrO₄^2+8H⁺+3eCr³⁺+4H₂O

+1.477

Pb⁴⁺+2ePb²⁺

+1.80

CrO₄^2+4H⁺+3eCrO₂^+2H₂O

+0.945

S

SO₄^2+H₂O+2eSO₃^2+2OH^

0.93

Cu

Cu²⁺+eCu⁺

+0.159

SO₄^2+2H⁺+2eSO₃^2+H₂O

+0.17

F

F₂+2e2F^

+2.87

SO₄^2+4H₂O+6eS+8OH^

 0.75

Fe

Fe²⁺+2eFe

 0.44

SO₄^2+4H⁺+2eH₂SO₃+H₂O

+0.17

Fe³⁺+eFe²⁺

+0.77

SO₄^2+8H⁺+6eS+4H₂O

+0.357

H

2H⁺+2eH₂

0.00

S+2eS^2

 0.48

Hg

Hg²⁺+2eHg

+0.85

S+2H⁺+2eH₂S

+0.17

I

I₂+2e2I^

+0.54

H₂SO₃+4H⁺+4eS+3H₂O

+0.45

2IO₃^+12H⁺+10eI₂+6H₂O

+1.195

Sn

Sn⁴⁺+2eSn²⁺

+0.15

Mn

MnO₄^+eMnO₄^2

+0.56

Sn²⁺+2eSn

 0.13

MnO₄^+4H⁺+3eMnO₂+2H₂O

+1.69

Zn

Zn²⁺+2eZn

 0.76

MnO₄^+8H⁺+5eMn²⁺+4H₂O

+1.51

MnO₄^+3H₂O+3eMnO₂+4OH^

+0.60

MnO₂+4H⁺+2eMn²⁺+2H₂O

+1.23

Cr

Cr₂O₄ + 4H₂O + 3e  Cr³⁺ + 8OH^-

- 0.13

Pb

PbO₂ + 4H⁺ + 2e  Pb²⁺ + 2H₂O

+1.45