Standard Reduction Potentials in Aqueous Solution at 25^oC
Acidic Solution	E^o (V)
F2(g) + 2 e^–   2 F^–(aq)	+2.87
Co^3+(aq) + e^–   Co^2+(aq)	+1.82
Pb^4+(aq) + 2 e^–   Pb^2+(aq)	+1.8
H2O2(aq) + 2 H^+(aq) + 2 e^–   2 H2O	+1.77
NiO2(s) + 4 H^+(aq) + 2 e^–   Ni^2+ (aq) + 2 H2O	+1.7
PbO2(s) + SO4^2–(aq) + 4 H^+(aq) + 2 e^–   PbSO4(s) + 2 H2O	+1.685
Au^+(aq) + e^–   Au(s)	+1.68
2 HClO(aq) + 2 H^+(aq) + 2 e^–   Cl2(g) + 2 H2O	+1.63
Ce^4+(aq) + e^–   Ce^3+(aq)	+1.61
NaBiO3(s) + 6 H^+(aq) + 2 e^–   Bi^3+(aq) + Na^+(aq) + 3 H2O	+~1.6
MnO4^–(aq) + 8 H^+(aq) + 5 e^–   Mn^2+(aq) + 4 H2O	+1.51
Au^3+(aq) + 3 e^–   Au(s)	+1.5
ClO3^–(aq) + 6 H^+(aq) + 5 e^–   1/2 Cl2(g) + 3 H2O	+1.47
BrO3^– + 6 H^+(aq) + 6 e^–   Br^–(aq) + 3 H2O	+1.44
Cl2(g) + 2 e^–   2 Cl^–(aq)	+1.358
Cr2O7^2– + 14 H^+(aq) + 6 e^–   2 Cr^3+(aq) + 7 H2O	+1.33
N2H5^+(aq) + 3 H^+(aq) + 2 e^–   2 NH4^+(aq)	+1.24
MnO2(s) + 4 H^+(aq) + 2 e^–   Mn^2+(aq) + 2 H2O	+1.23
O2(g) + 4 H^+(aq) + 4 e^–   2 H2O	+1.229
Pt^2+(aq) + 2 e^–   Pt(s)	+1.2
IO3^–(aq) + 6 H^+(aq) + 5 e^–   1/2 I2(aq) + 3 H2O	+1.195
ClO4^–(aq) + 2 H^+(aq) + 2 e^–   ClO3^–(aq) + H2O	+1.19
Br2(l) + 2 e^–   2 Br^–(aq)	+1.066
AuCl4^– + 3 e^–   Au(s) + 4 Cl^–(aq)	+1
Pd^2+(aq) + 2 e^–   Pd(s)	+0.987
NO3^–(aq) + 4 H^+(aq) + 3 e^–   NO(g) + 2 H2O	+0.96
NO3^–(aq) + 3 H^+(aq) + 2 e^–   HNO2(aq) + H2O	+0.94
2 Hg^2+(aq) + 2 e^–   Hg2^2+(aq)	+0.92
Hg^2+(aq) + 2 e^–   Hg(l)	+0.855
Ag^+(aq) + e^–   Ag(s)	+0.7994
Hg2^2+(aq) + 2 e^–   2 Hg(l)	+0.789
Fe^3+(aq) + e^–   Fe^2+(aq)	+0.771
SbCl6^–(aq) + 2 e^–   SbCl4^–(aq) + 2 Cl^–(aq)	+0.75
[PtCl4]^2–(aq) + 2 e^–   Pt(s) + 4 Cl^–(aq)	+0.73
O2(g) + 2 H^+(aq) + 2 e^–   H2O2(aq)	+0.682
[PtCl6]^2–(aq) + 2 e^–   [PtCl4]^2–(aq) + 2 Cl^–(aq)	+0.68
H3AsO4(aq) + 2 H^+(aq) + 2 e^–   H3AsO3(aq) + H2O	+0.58
I2(s) + 2 e^–   2 I^–(aq)	+0.535
TeO2(s) + 4 H^+(aq) + 4 e^–   Te(s) + 2 H2O	+0.529
Cu^+(aq) + e^–   Cu(s)	+0.521
[RhCl6]^3–(aq) + 3 e^–   Rh(s) + 6 Cl^–(aq)	+0.44
Cu^2+(aq) + 2 e^–   Cu(s)	+0.337
HgCl2(s) + 2 e^–   2 Hg(l) + 2 Cl^–(aq)	+0.27
AgCl(s) + e^–   Ag(s) + Cl^–(aq)	+0.222
SO4^2–(aq) + 4 H^+(aq) + 2 e^–   SO2(g) + 2 H2O	+0.2
SO4^2–(aq) + 4 H^+(aq) + 2 e^–   H2SO3(g) + H2O	+0.17
Cu^2+(aq) + e^–   Cu^+(aq)	+0.153
Sn^4+(aq) + 2 e^–   Sn^2+(aq)	+0.15
S(s) + 2 H^+(aq) + 2 e^–   H2S(aq)	+0.14
AgBr(s) + e^–   Ag(s) + Br^–(aq)	+0.0713
2 H^+(aq) + 2 e^–   H2(g) (reference electrode)	0
N2O(g) + 6 H^+(aq) + H2O + 4 e^–   2 NH3OH^+(aq)	-0.05
Pb^2+(aq) + 2 e^–   Pb(s)	-0.126
Sn^2+(aq) + 2 e^–   Sn(s)	-0.14
AgI(s) + e^–   Ag(s) + I^–(aq)	-0.15
[SnF6]^2–(aq) + 4 e^–   Sn(s) + 6 F^–(aq)	-0.25
Ni^2+(aq) + 2 e^–   Ni(s)	-0.25
Co^2+(aq) + 2 e^–   Co(s)	-0.28
Tl^+(aq) + e^–   Tl(s)	-0.34
PbSO4(s) + 2 e^–   Pb(s) + SO4^2–(aq)	-0.356
Se(s) + 2 H^+(aq) + 2 e^–   H2Se(aq)	-0.4
Cd^2+(aq) + 2 e^–   Cd(s)	-0.403
Cr^3+(aq) + e^–   Cr^2+(aq)	-0.41
Fe^2+(aq) + 2 e^–   Fe(s)	-0.44
2 CO2(g) + 2 H^+(aq) + 2 e^–   (COOH)2(aq)	-0.49
Ga^3+(aq) + 3 e^–   Ga(s)	-0.53
HgS(s) + 2 H^+(aq) + 2 e^–   Hg(l) + H2S(g)	-0.72
Cr^3+(aq) + 3 e^–   Cr(s)	-0.74
Zn^2+(aq) + 2 e^–   Zn(s)	-0.763
2H2O(l) + 2 e^–   H2(g) + 2OH^-(aq)	-0.8277
Cr^2+(aq) + 2 e^–   Cr(s)	-0.91
Mn^2+(aq) + 2 e^–   Mn(s)	-1.18
V^2+(aq) + 2 e^–   V(s)	-1.18
Zr^4+(aq) + 4 e^–   Zr(s)	-1.53
Al^3+(aq) + 3 e^–   Al(s)	-1.66
H2(g) + 2 e^–   2 H^–(aq)	-2.25
Mg^2+(aq) + 2 e^–   Mg(s)	-2.37
Na^+(aq) + e^–   Na(s)	-2.714
Ca^2+(aq) + 2 e^–   Ca(s)	-2.87
Sr^2+(aq) + 2 e^–   Sr(s)	-2.89
Ba^2+(aq) + 2 e^–   Ba(s)	-2.9
Rb^+(aq) + e^–   Rb(s)	-2.925
K^+(aq) + e^–   K(s)	-2.925
Li^+(aq) + e^–   Li(s)	-3.045
Basic Solution
ClO^–(aq) + H2O + 2 e^–   Cl^–(aq) + 2 OH^–(aq)	0.89
OOH^–(aq) + H2O + 2 e^–   3 OH^–(aq)	0.88
2 NH2OH(aq) + 2 e^–   N2H4(aq) + 2 OH^–(aq)	0.74
ClO3^– (aq) + 3 H2O + 6 e^–   Cl^–(aq) + 6 OH^–(aq)	0.62
MnO4^–(aq) + 2 H2O + 3 e^–   MnO2(s) + 4 OH^–(aq)	0.588
MnO4^–(aq) + e^–   MnO4^2–(aq)	0.564
NiO2(s) + 2 H2O + 2 e^-   Ni(OH)2(s) + 2 OH^–(aq)	0.49
Ag2CrO4(s) + 2 e^–   2 Ag(s) + CrO4^2–(aq)	0.446
O2(g) + 2 H2O + 4 e^–   4 OH^–(aq)	0.4
ClO4^–(aq) + H2O + 2e^–   ClO3^–(aq) + 2 OH^–(aq)	0.36
Ag2O(s) + H2O + 2e^–   2 Ag(s) + 2 OH^–(aq)	0.34
2 NO2^–(aq) + 3 H2O + 4 e^–   N2O(g) + 6 OH^–(aq)	0.15
N2H4(aq) + 2 H2O + 2 e^–   2 NH3(aq) + 2 OH^–(aq)	0.1
[Co(NH3)6]^3+(aq) + e^–   [Co(NH3)6]^2+(aq)	0.1
HgO(s) + H2O + 2e^–   Hg(l) + 2 OH^–(aq)	0.0984
O2(g) + H2O + 2 e^–   OOH^–(aq) + OH^–(aq)	0.076
NO3^–(aq) + H2O + 2 e^–   NO2^–(aq) + 2 OH^–(aq)	0.01
MnO2(s) + 2 H2O + 2 e^–   Mn(OH)2(s) + 2 OH^–(aq)	-0.05
CrO4^2–(aq) + 4 H2O + 3 e^–   Cr(OH)3(s) + 5 OH^–(aq)	-0.12
Cu(OH)2(s) + 2 e^–   Cu(s) + 2 OH^–(aq)	-0.36
Fe(OH)3(s) + e^–   Fe(OH)2(s) + OH^–(aq)	-0.56
2 H2O + 2 e^–   H2(g) + 2 OH^–(aq)	-0.8277
2 NO3^–(aq) + 2 H2O + 2 e^–   N2O4(g) + 4 OH^–(aq)	-0.85
Fe(OH)2(s) + 2 e^–   Fe(s) + 2 OH^–(aq)	-0.877
SO4^2–(aq) + H2O + 2 e^–   SO3^2–(aq) + 2 OH^–(aq)	-0.93
N2(g) + 4 H2O + 4 e^–   N2H4(aq) + 4 OH^–(aq)	-1.15
[Zn(OH)4]^2–(aq) + 2 e^–   Zn(s) + 4 OH^–(aq)	-1.22
Zn(OH)2(s) + 2 e^–   Zn(s) + 2 OH^–(aq)	-1.245
[Zn(CN)4]^2–(aq) + 2 e^–   Zn(s) + 4 CN^–(aq)	-1.26
Cr(OH)3(s) + 3 e^–   Cr(s) + 3 OH^–(aq)	-1.3
SiO3^2–(aq) + 3 H2O + 4 e^–   Si(s) + 6 OH^–(aq)	-1.7