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Table_of_standard_electrode_potentials.
Standard Potentials in Aqueous Solution by Allen J. Bard
Tables of Standard Electrode Potentials by Guilio Milazzo
Table of standard electrode potentials
The values below are standard electrode potentials taken at 25°C in aqueous solution.
Cathode (Reduction)
Half-Reaction Standard Potential E°
(volts)
Li+(aq) + e- ->
Li(s)
-3.04
Rb+ + e- -> Rb (s)
-2.98
K+(aq) + e- ->
K(s)
-2.93
Cs+(aq) + e- ->
Cs(s)
-2.92
Ba2+(aq) + 2e- -> Ba(s)
-2.91
Sr2+(aq) + 2e- -> Sr(s)
-2.89
Ca2+(aq) + 2e- -> Ca(s)
-2.76
Na+(aq) + e- ->
Na(s)
-2.71
Mg2+(aq) + 2e- ->
Mg(s)
-2.38
Al3+(aq) + 3e- ->
Al(s)
-1.66
Mn2+(aq) + 2e- ->
Mg(s)
-1.19
2H2O(l) + 2e- ->
H2(g) + 2OH-(aq)
-0.83
Zn2+(aq) + 2e- ->
Zn(s)
-0.76
Cr3+(aq) + 3e- ->
Cr(s)
-0.74
Fe2+(aq) + 2e- ->
Fe(s)
-0.41
Cd2+(aq) + 2e- ->
Cd(s)
-0.40
Co2+(aq) + 2e- ->
Co(s)
-0.28
Ni2+(aq) + 2e- ->
Ni(s)
-0.23
Sn2+(aq) + 2e- -> Sn(s)
-0.14
Pb2+(aq) + 2e- ->
Pb(s)
-0.13
Fe3+(aq) + 3e- ->
Fe(s)
-0.04
2H+(aq) + 2e- ->
H2(g)
0.00
Sn4+(aq) + 2e- ->
Sn2+(aq)
0.15
Cu2+(aq) + 2e- ->
Cu+(aq)
0.16
ClO4-(aq) +
H2O(l) + 2e- -> ClO3-(aq) +
2OH-(aq)
0.17
AgCl(s) + e- -> Ag(s) +
Cl-(aq)
0.22
Cu2+(aq) + 2e- ->
Cu(s)
0.34
ClO3-(aq) +
H2O(l) + 2e- ->
ClO2-(aq) + 2OH-(aq)
0.35
O-(aq) + H2O(l) +
2e- -> I-(aq) + 2OH-(aq)
0.49
Cu+(aq) + e- ->
Cu(s)
0.52
I2(s) + 2e- ->
2I-(aq)
0.54
ClO2-(aq) +
H2O(l) + 2e- -> ClO-(aq) +
2OH-(aq)
0.59
Fe3+(aq) + e- ->
Fe2+(aq)
0.77
Hg22+(aq) + 2e-
-> 2Hg(l)
0.80
Ag+(aq) + e- -> Ag(s)
0.80
Hg2+(aq) + 2e- ->
Hg(l)
0.85
ClO-(aq) + H2O(l) +
2e- -> Cl-(aq) + 2OH-(aq)
0.90
2Hg2+(aq) + 2e- ->
Hg22+(aq)
0.90
NO3-(aq) +
4H+(aq) + 3e- -> NO(g) +
2H2O(l)
0.96
Br2(l) + 2e- ->
2Br-(aq)
1.07
O2(g) + 4H+(aq) +
4e- -> 2H2O(l)
1.23
Cr2O72-(aq) +
14H+(aq) + 6e- -> 2Cr3+(aq) +
7H2O(l)
1.33
Cl2(g) + 2e- ->
2Cl-(aq)
1.36
Ce4+(aq) + e- ->
Ce3+(aq)
1.44
MnO4-(aq) +
8H+(aq) + 5e- -> Mn2+(aq) +
4H2O(l)
1.49
H2O2(aq) +
2H+(aq) + 2e- -> 2H2O(l)
1.78
Co3+(aq) + e- ->
Co2+(aq)
1.82
S2O82-(aq) +
2e- -> 2SO42-(aq)
2.01
O3(g) + 2H+(aq) +
2e- -> O2(g) + H2O(l)
2.07
F2(g) + 2e- ->
2F-(aq)
2.87
See also: electrochemical potential
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