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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