Acidic Solution | Eo (V) |
F2(g) + 2 e– 2 F–(aq) | +2.87 |
Co3+(aq) + e– Co2+(aq) | +1.82 |
Pb4+(aq) + 2 e– Pb2+(aq) | +1.8 |
H2O2(aq) + 2 H+(aq) + 2 e– 2 H2O | +1.77 |
NiO2(s) + 4 H+(aq) + 2 e– Ni2+ (aq) + 2 H2O | +1.7 |
PbO2(s) + SO42–(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 |
Ce4+(aq) + e– Ce3+(aq) | +1.61 |
NaBiO3(s) + 6 H+(aq) + 2 e– Bi3+(aq) + Na+(aq) + 3 H2O | +~1.6 |
MnO4–(aq) + 8 H+(aq) + 5 e– Mn2+(aq) + 4 H2O | +1.51 |
Au3+(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 |
Cr2O72– + 14 H+(aq) + 6 e– 2 Cr3+(aq) + 7 H2O | +1.33 |
N2H5+(aq) + 3 H+(aq) + 2 e– 2 NH4+(aq) | +1.24 |
MnO2(s) + 4 H+(aq) + 2 e– Mn2+(aq) + 2 H2O | +1.23 |
O2(g) + 4 H+(aq) + 4 e– 2 H2O | +1.229 |
Pt2+(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 |
Pd2+(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 Hg2+(aq) + 2 e– Hg22+(aq) | +0.92 |
Hg2+(aq) + 2 e– Hg(l) | +0.855 |
Ag+(aq) + e– Ag(s) | +0.7994 |
Hg22+(aq) + 2 e– 2 Hg(l) | +0.789 |
Fe3+(aq) + e– Fe2+(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 |
Cu2+(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 |
SO42–(aq) + 4 H+(aq) + 2 e– SO2(g) + 2 H2O | +0.2 |
SO42–(aq) + 4 H+(aq) + 2 e– H2SO3(g) + H2O | +0.17 |
Cu2+(aq) + e– Cu+(aq) | +0.153 |
Sn4+(aq) + 2 e– Sn2+(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 |
Pb2+(aq) + 2 e– Pb(s) | -0.126 |
Sn2+(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 |
Ni2+(aq) + 2 e– Ni(s) | -0.25 |
Co2+(aq) + 2 e– Co(s) | -0.28 |
Tl+(aq) + e– Tl(s) | -0.34 |
PbSO4(s) + 2 e– Pb(s) + SO42–(aq) | -0.356 |
Se(s) + 2 H+(aq) + 2 e– H2Se(aq) | -0.4 |
Cd2+(aq) + 2 e– Cd(s) | -0.403 |
Cr3+(aq) + e– Cr2+(aq) | -0.41 |
Fe2+(aq) + 2 e– Fe(s) | -0.44 |
2 CO2(g) + 2 H+(aq) + 2 e– (COOH)2(aq) | -0.49 |
Ga3+(aq) + 3 e– Ga(s) | -0.53 |
HgS(s) + 2 H+(aq) + 2 e– Hg(l) + H2S(g) | -0.72 |
Cr3+(aq) + 3 e– Cr(s) | -0.74 |
Zn2+(aq) + 2 e– Zn(s) | -0.763 |
2H2O(l) + 2 e– H2(g) + 2OH-(aq) | -0.8277 |
Cr2+(aq) + 2 e– Cr(s) | -0.91 |
Mn2+(aq) + 2 e– Mn(s) | -1.18 |
V2+(aq) + 2 e– V(s) | -1.18 |
Zr4+(aq) + 4 e– Zr(s) | -1.53 |
Al3+(aq) + 3 e– Al(s) | -1.66 |
H2(g) + 2 e– 2 H–(aq) | -2.25 |
Mg2+(aq) + 2 e– Mg(s) | -2.37 |
Na+(aq) + e– Na(s) | -2.714 |
Ca2+(aq) + 2 e– Ca(s) | -2.87 |
Sr2+(aq) + 2 e– Sr(s) | -2.89 |
Ba2+(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– MnO42–(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) + CrO42–(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 |
CrO42–(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 |
SO42–(aq) + H2O + 2 e– SO32–(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 |
SiO32–(aq) + 3 H2O + 4 e– Si(s) + 6 OH–(aq) | -1.7 |