STANDARD REDUCTION POTENTIALS AT 298.15 K (25°C)
Half Reaction E° (V)
Ag+(aq) + e- → Ag(s) +0.799
AgBr(s) + e- → Ag(s) + Br-(aq) +0.095
AgCl(s) + e- → Ag(s) + Cl-(aq) +0.222
Ag(CN)2-(aq) + e- → Ag(s) + 2CN-(aq) -0.310
Ag2CrO4 (s) + 2e- → 2Ag(s) + CrO42-(aq) +0.446
AgI(s) + e- → Ag(s) + I-(aq) -0.151
Ag(S2O3)23-(aq) + e- → Ag(s) + 2S2O32-(aq) +0.010
Al3+(aq) + 3e- → Al(s) -1.660
H3AsO4 (aq) + 2H+(aq) + 2e- → H3AsO3 (aq) + H2O(l) +0.559
Ba2+(aq) + 2e- → Ba(s) -2.900
BiO+(aq) + 2H+(aq) + 3e- → Bi(s) + H2O(l) +0.320
Br2 (l) + 2e- → 2Br-(aq) +1.065
BrO3-(aq) + 6H+(aq) +5e- → Br2 (l) + 3H2O(l) +1.520
2CO2 (g) + 2H+(aq) + 2e- → H2C2O4 (aq) -0.490
Ca2+(aq) + 2e- → Ca(s) -2.870
Cd2+(aq) + 2e- → Cd(s) -0.403
Ce4+(aq) + e- → Ce3+(aq) +1.610
Cl2 (g) + 2e- → 2Cl-(aq) +1.359
HClO(aq) + H+(aq) + e- → Cl2 (g) + H2O(l) +1.630
ClO-(aq) + H2O(l) + 2e- → Cl-(aq) + 2OH-(aq) +0.890
ClO3-(aq) + 6H+(aq) + 5e- → Cl2 (g) + 3H2O(l) +1.470
Co2+(aq) + 2e- → Co(s) -0.277
Co3+(aq) + e- → Co2+(aq) +1.842
Cr3+(aq) + 3e- → Cr(s) -0.740
Cr3+(aq) + e- → Cr2+(aq) -0.410
Cr2O72-(aq) + 14H+(aq) + 6e- → 2Cr3+(aq) + 7H2O(l) +1.330
CrO42-(aq) + 4H2O(l) + 3e- → Cr(OH)3 (s) + 5OH-(aq) -0.130
Cu2+(aq) + 2e- → Cu(s) +0.337
Cu2+(aq) + e- → Cu+(aq) +0.153
Cu+(aq) + e- → Cu(s) +0.521
CuI(s) + e- → Cu(s) + I-(aq) -0.185
F2 (g) + 2e- → 2F-(aq) +2.870
Fe2+(aq) + 2e- → Fe(s) -0.440
Fe3+(aq) + e- → Fe2+(aq) +0.771
Fe(CN)63-(aq) + e- → Fe(CN)64-(aq) +0.360
2H+(aq) + 2e- → H2 (g) 0.000
2H2O(l) + 2e- → H2 (g) + 2OH-(aq) -0.830
HO2-(aq) + H2O(l) + 2e- → 3OH-(aq) +0.880
H2O2 (aq) + 2H+(aq) + 2e- → 2H2O(l) +1.776
Hg22+(aq) + 2e- → 2Hg(l) +0.789
2Hg2+(aq) + 2e- → Hg22+(aq) +0.920
Hg2+(aq) + 2e- → Hg(l) +0.854
I2 (s) + 2e- → 2I-(aq) +0.536
IO3-(aq) + 6H+(aq) + 5e- → I2 (s) + 3H2O(l) +1.195
K+(aq) + e- → K(s) -2.925
Li+(aq) + e- → Li(s) -3.050
Mg2+(aq) + 2e- → Mg(s) -2.370
Mn2+(aq) + 2e- → Mn(s) -1.180
MnO2 (s) + 4H+(aq) + 2e- → Mn2+(aq) + 2H2O(l) +1.230
MnO4-(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l) +1.510
MnO4-(aq) + 2H2O(l) + 3e- → MnO2 (s) + 4OH-(aq) +0.590
HNO2 (aq) + H+(aq) + e- → NO(g) + H2O(l) +1.000
N2 (g) + 4H2O(l) + 4e- → 4OH-(aq) + N2H4 (aq) -1.160
N2 (g) + 5H+(aq) + 4e- → N2H5+(aq) -0.230
NO3-(aq) + 4H+(aq) + 3e- → NO(g) + 2H2O(l) +0.960
Na+(aq) + e- → Na(s) -2.710
Ni2+(aq) + 2e- → Ni(s) -0.280
O2 (g) + 4H+(aq) + 4e- → 2H2O(l) +1.230
O2 (g) + 2H2O(l) + 4e- → 4OH-(aq) +0.40
O2 (g) + 2H+(aq) + 2e- → H2O2 (aq) +0.68
O3 (g) + 2H+(aq) + 2e- → O2 (g) + H2O(l) +2.07
Pb2+(aq) + 2e- → Pb(s) -0.126
PbO2 (s) + HSO4-(aq) + 3H+(aq) + 2e- → PbSO4 (s) + 2H2O(l) +1.685
PbSO4 (s) + H+(aq) + 2e- → Pb(s) + HSO4-(aq) -0.356
PtCl42-(aq) + 2e- → Pt(s) + 4Cl-(aq) +0.73
S(s) + 2H+(aq) + 2e- → H2S(g) +0.141
H2SO3 (aq) + 4H+(aq) + 4e- → S(s) + 3H2O(l) +0.45
HSO4-(aq) + 3H+(aq) + 2e- → H2SO3 (aq) + H2O(l) +0.17
Sn2+(aq) + 2e- → Sn(s) -0.136
Sn4+(aq) + 2e- → Sn2+(aq) +0.154
VO2+(aq) + 2H+(aq) + e- → VO2+(aq) + H2O(l) +1.00
Zn2+(aq) + 2e- → Zn(s) -0.763