General Chemistry/Standard Reduction Potentials

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Half Reaction Eo (V)
F2(g) + 2 e- 2 F- 2.87
Co3+ + e- Co2+

1.82

Au3+ + 3e- Au(s) 1.50
Cl2 (g) + 2 e- 2 Cl- 1.36
O2 (g) + 4 H+ + 4 e- 2 H2O(l) 1.23
Br2(l) + 2 e- 2 Br- 1.07
2 Hg2+ + 2 e- Hg22+ 0.92
Ag+ + e- Ag(s) 0.80
Hg22+ + 2 e- 2 Hg (l) 0.79
Fe3+ + e- Fe2+ 0.77
I2(s) + 2 e- 2 I- 0.53
Cu+ + e- Cu(s) 0.52
Cu2++ 2 e- Cu(s) 0.34
Cu2++ e- Cu+ 0.15
Sn4+ + 2 e- Sn2+ 0.15
S(s) + 2 H+ + 2 e- H2S(g) 0.15
2 H+ + 2 e- H2(g) 0.00
Pb2+ + 2 e- Pb(s) -0.13
Sn2+ + 2 e- Sn(s) -0.14
Ni2+ + 2 e- Ni(s) -0.25
Co2+ + 2 e- Co(s) -0.28
Tl+ + e- Tl(s) -0.34
Cd2+ + 2 e- Cd(s) -0.40
Cr3+ + e- Cr2+ -0.41
Fe2+ + 2 e- Fe(s) -0.44
Cr3+ + 3 e- Cr(s) -0.74
Zn2+ + 2 e- Zn(s) -0.76
Mn2+ + 2 e- Mn(s) -1.18
Al3+ + 3 e- Al(s) -1.66
Be2+ + 2 e- Be(s)

-1.70

Mg2+ + 2 e- Mg(s) -2.37
Na+ + e- Na(s) -2.71
Ca2+ + 2 e- Ca(s) -2.87
Sr2+ + 2 e- Sr(s) -2.89
Ba2+ + 2 e- Ba(s) -2.90
Rb+ + e- Rb(s) -2.92
K+ + e- K(s) -2.92
Cs+ + e- Cs(s) -2.92
Li+ + e- Li(s) -3.05