Standard Reduction Potentials at 25oC
F2(g) + 2e– ⇌ 2F–(aq)
MnO4–(aq) + 4H+(aq) + 3e– ⇌ MnO2(s) + 2H2O
Ce4+(aq) + e– ⇌ Ce3+(aq)
Au+(aq) + e– ⇌ Au(s)
MnO4–(aq) + 8H+(aq) + 5e– ⇌ Mn2+(aq) + 4H2O
Cl2(g) + 2e– ⇌ 2Cl–(aq)
Cr2O72– + 14H+(aq) + 6e– ⇌ 2Cr3+(aq) + 7H2O
Tl3+(aq) + 2e– ⇌ Tl+(aq)
O2(g) + 4H+ + 4e− ⇌ 2H2O(l)
MnO2(s) + 4H+(aq) + 2e– ⇌ Mn2+(aq) + 2H2O
IO3–(aq) + 6H+(aq) + 5e– ⇌ ½ I2(s) + 3H2O
IO3–(aq) + 6H+(aq) + 5e– ⇌ I-(aq) + 3H2O
Br2(l) + 2e– ⇌ 2Br–(aq)
Hg2+(aq) + 2e– ⇌ Hg(l)
Ag+(aq) + e– ⇌ Ag(s)
Hg22+(aq) + 2e– ⇌ 2Hg(l)
Fe3+(aq) + e– ⇌ Fe2+(aq)
O2(g) + 2H+ + 2e− ⇌ H2O2(aq)
H3AsO4(aq) +2H+(aq) +2e– ⇌ H3AsO3(aq) +H2O
I2(s) + 2e– ⇌ 2I–(aq)
Cu+(aq) + e– ⇌ Cu(s)
VO2+(aq) + 2H+(aq) + e– ⇌ V3+(aq) + H2O
Eo (V)
+2.87
+1.70
+1.61
+1.68
+1.51
+1.36
+1.33
+1.25
+1.23
+1.23
+1.21
+1.20
+1.10
+0.85
+0.80
+0.79
+0.77
+0.68
+0.56
+0.54
+0.52
+0.36
Standard Reduction Potentials at 25oC
Fe(CN)64+(aq) + e– ⇌ Fe(CN)63+(aq)
Cu2+(aq) + 2e– ⇌ Cu(s)
UO22+(aq) + 4H+(aq) + 2e– ⇌ U4+(aq) + 2H2O
Cu2+(aq) + e– ⇌ Cu+(aq)
Sn4+(aq) + 2e– ⇌ Sn2+(aq)
S4O62–(aq) + 2e– ⇌ 2S2O32–(aq)
2H+(aq) + 2e– ⇌ H2(g)
Fe3+(aq) + 2e– ⇌ Fe(s)
Pb2+(aq) + 2e– ⇌ Pb(s)
Ni2+(aq) + 2e– ⇌ Ni(s)
Sn2+(aq) + 2e– ⇌ Sn(s)
Co2+(aq) + 2e– ⇌ Co(s)
Tl+(aq) + e– ⇌ Tl(s)
Cd2+(aq) + 2e– ⇌ Cd(s)
Cr3+(aq) + e– ⇌ Cr2+(aq)
Fe2+(aq) + 2e– ⇌ Fe(s)
Cr3+(aq) + 3e– ⇌ Cr(s)
Zn2+(aq) + 2e– ⇌ Zn(s)
Cr2+(aq) + 3e– ⇌ Cr(s)
Mg2+(aq) + 2e– ⇌ Mg(s)
Ba2+(aq) + 2e– ⇌ Ba(s)
K+(aq) + e– ⇌ K(s)
Li+(aq) + e– ⇌ Li(s)
Eo (V)
+0.36
+0.34
+0.27
+0.15
+0.15
+0.10
0.00
-0.04
-0.13
-0.25
-0.14
-0.28
-0.34
-0.40
-0.41
-0.44
-0.74
-0.76
-0.89
-2.36
-2.91
-2.93
-3.05