Half-reaction
| Eo (V)
|
Li+(aq) + e− → Li(s)
| −3.05
|
Rb+(aq) + e− → Rb(s)
| −2.98
|
K+(aq) + e− → K(s)
| −2.93
|
Cs+(aq) + e− → Cs(s)
| −2.92
|
Ba2+(aq) + 2e− → Ba(s)
| −2.91
|
Sr2+(aq) + 2e− → Sr(s)
| −2.89
|
Ra2+(aq) + 2e− → Ra(s)
| −2.80
|
Ca2+(aq) + 2e− → Ca(s)
| −2.76
|
Na+(aq) + e− → Na(s)
| −2.71
|
Mg2+(aq) + 2e− → Mg(s)
| −2.38
|
H2 + 2e− → 2H−
| −2.25
|
Ac3+(aq) + 3e− → Ac(s)
| −2.20
|
Be2+(aq) + 2e− → Be(s)
| −1.85
|
Al3+(aq) + 3e− → Al(s)
| −1.68
|
Ti2+(aq) + 2e− → Ti(s)
| −1.63
|
TiO(s) + 2H+ + 2e− → Ti(s) + H2O
| −1.31
|
Ti2O3(s) + 2H+ + 2e− → 2TiO(s) + H2O
| −1.23
|
Ti3+(aq) + 3e− → Ti(s)
| −1.21
|
Mn2+(aq) + 2e− → Mn(s)
| −1.18
|
V2+(aq) + 2e− → V(s)
| −1.13
|
Nb3+(aq) + 3e− → Nb(s)
| −1.099
|
Sn(s) + 4H+ + 4e− → SnH4(g)
| −1.07
|
SiO2(s) + 4H+ + 4e− → Si(s) + 2H2O
| −0.91
|
B(OH)3(aq) + 3H+ + 3e− → B(s) + 3H2O
| −0.89
|
TiO2+(aq) + 2H+ + 4e− → Ti(s) + H2O
| −0.86
|
2 H2O(l) + 2e– → H2(g) + 2 OH–(aq)
| −0.83
|
Zn2+(aq) + 2e− → Zn(s)
| −0.76
|
Cr3+(aq) + 3e− → Cr(s)
| −0.74
|
Au(CN)2–(aq) + e– → Au(s) +2 CN–(aq)
| −0.60
|
PbO(s) + H2O + 2e− → Pb(s) + 2OH-
| −0.58
|
2TiO2(s) + 2H+ + 2e− → Ti2O3(s) + H2O
| −0.56
|
Ga3+(aq) + 3e− → Ga(s)
| −0.53
|
H3PO2(aq) + H+ + e− → P(s) + 2H2O
| −0.51
|
H3PO3(aq) + 3H+ + 3e− → P(s) + 3H2O
| −0.50
|
H3PO3(aq) + 2H+ + 2e− → H3PO2(aq) + H2O
| −0.50
|
Fe2+(aq) + 2e− → Fe(s)
| −0.44
|
2CO2(g) + 2H+(aq) + 2e– → HOOCCOOH(aq)
| −0.43
|
Cr3+(aq) + e− → Cr2+(aq)
| −0.42
|
Cd2+(aq) + 2e− → Cd(s)
| −0.40
|
PbSO4(s) + 2e– → Pb(s) +SO42-(aq)
| −0.36
|
GeO2(s) + 2H+ + 2e− → GeO(s) + H2O
| −0.37
|
In3+(aq) + 3e− → In(s)
| −0.34
|
Tl+(aq) + e− → Tl(s)
| −0.34
|
Ge(s) + 4H+ + 4e− → GeH4(g)
| −0.29
|
Co2+(aq) + 2e → Co(s)
| −0.28
|
H3PO4(aq) + 2H+ + 2e− → H3PO3(aq) + H2O
| −0.28
|
V3+(aq) + e− → V2+(aq)
| −0.26
|
Ni2+(aq) + 2e− → Ni(s)
| −0.25
|
As(s) + 3H+ + 3e− → AsH3(g)
| −0.23
|
MoO2(s) + 4H+ + 4e− → Mo(s) + 2H2O
| −0.15
|
Si(s) + 4H+ + 4e− → SiH4(g)
| −0.14
|
Sn2+(aq) + 2e− → Sn(s)
| −0.13
|
O2(g) + H+ + e− → HO2•(aq)
| −0.13
|
Pb2+(aq) + 2e− → Pb(s)
| −0.13
|
WO2(s) + 4H+ + 4e− → W(s) + 2H2O
| −0.12
|
CO2(g) + 2H+ + 2e− → HCOOH(aq)
| −0.11
|
Se(s) + 2H+ + 2e− → H2Se(g)
| −0.11
|
CO2(g) + 2H+ + 2e− → CO(g) + H2O
| −0.11
|
SnO(s) + 2H+ + 2e− → Sn(s) + H2O
| −0.10
|
SnO2(s) + 2H+ + 2e− → SnO(s) + H2O
| −0.09
|
WO3(aq) + 6H+ + 6e− → W(s)
| −0.09
|
P(s) + 3H+ + 3e− → PH3(g)
| −0.06
|
HCOOH(aq) + 2H+ + 2e− → HCHO(aq) + H2O
| −0.03
|
2H+(aq) + 2e− → H2(g)
| 0.00
|
H2MoO4(aq) + 6H+ + 6e− → Mo(s) + 4H2O
| +0.11
|
Ge4+(aq) + 4e− → Ge(s)
| +0.12
|
C(s) + 4H+ + 4e− → CH4(g)
| +0.13
|
HCHO(aq) + 2H+ + 2e− → CH3OH(aq)
| +0.13
|
S(s) + 2H+ + 2e− → H2S(g)
| +0.14
|
Sn4+(aq) + 2e− → Sn2+(aq)
| +0.15
|
Cu2+(aq) + e− → Cu+(aq)
| +0.16
|
HSO4−(aq) + 3H+ + 2e− → 2H2O(l) + SO2(aq)
| +0.16
|
SO42−(aq) + 4H+ + 2e− → 2H2O(l) + SO2(aq)
| +0.17
|
SbO+ + 2H+ + 3e− → Sb(s) + H2O
| +0.20
|
H3AsO3(aq) + 3H+ + 3e− → As(s) + 3H2O
| +0.24
|
GeO(s) + 2H+ + 2e− → Ge(s) + H2O
| +0.26
|
Re3+(aq) + 3e− → Re(s)
| +0.300
|
Bi3+(aq) + 3e− → Bi(s)
| +0.32
|
VO2+(aq) + 2H+ + e− → V3+(aq)
| +0.34
|
Cu2+(aq) + 2e− → Cu(s)
| +0.34
|
[Fe(CN)6]3−(aq) + e− → [Fe(CN)6]4−(aq)
| +0.36
|
O2(g) + 2H2O(l) + 4e– → 4OH–(aq)
| +0.40
|
H2MoO4 + 6H+ + 3e− → Mo3+(aq)
| +0.43
|
CH3OH(aq) + 2H+ + 2e− → CH4(g) + H2O
| +0.50
|
SO2(aq) + 4H+ + 4e− → S(s) + 2H2O
| +0.50
|
Cu+(aq) + e− → Cu(s)
| +0.52
|
CO(g) + 2H+ + 2e− → C(s) + H2O
| +0.52
|
I2(s) + 2e− → 2I−(aq)
| +0.54
|
I3−(aq) + 2e− → 3I−(aq)
| +0.54
|
[AuI4]−(aq) + 3e− → Au(s) + 4I−(aq)
| +0.56
|
H3AsO4(aq) + 2H+ + 2e− → H3AsO3(aq) + H2O
| +0.56
|
[AuI2]−(aq) + e− → Au(s) + 2I−(aq)
| +0.58
|
MnO4–(aq) + 2H2O(l) + 3e– → MnO2(s) + 4OH–(aq)
| +0.59
|
S2O32− + 6H+ + 4e− → 2S(s) + 3H2O
| +0.60
|
H2MoO4(aq) + 2H+ + 2e− → MoO2(s) + 2H2O
| +0.65
|
O2(g) + 2H+ + 2e− → H2O2(aq)
| +0.70
|
Tl3+(aq) + 3e− → Tl(s)
| +0.72
|
H2SeO3(aq) + 4H+ + 4e− → Se(s) + 3H2O
| +0.74
|
Fe3+(aq) + e− → Fe2+(aq)
| +0.77
|
Hg22+(aq) + 2e− → 2Hg(l)
| +0.80
|
Ag+(aq) + e− → Ag(s)
| +0.80
|
NO3–(aq) + 2H+ + e− → NO2(g) + H2O
| +0.80
|
[AuBr4]−(aq) + 3e− → Au(s) + 4Br−(aq)
| +0.85
|
Hg2+(aq) + 2e− → Hg(l)
| +0.85
|
MnO4−(aq) + H+ + e− → HMnO4−(aq)
| +0.90
|
2Hg2+(aq) + 2e− → Hg22+(aq)
| +0.91
|
[AuCl4]−(aq) + 3e− → Au(s) + 4Cl−(aq)
| +0.93
|
MnO2(s) + 4H+ + e− → Mn3+(aq) + 2H2O
| +0.95
|
[AuBr2]−(aq) + e− → Au(s) + 2Br−(aq)
| +0.96
|
Br2(l) + 2e− → 2Br−(aq)
| +1.07
|
Br2(aq) + 2e− → 2Br−(aq)
| +1.09
|
IO3−(aq) + 5H+ + 4e− → HIO(aq) + 2H2O
| +1.13
|
[AuCl2]−(aq) + e− → Au(s) + 2Cl−(aq)
| +1.15
|
HSeO4−(aq) + 3H+ + 2e− → H2SeO3(aq) + H2O
| +1.15
|
Ag2O(s) + 2H+ + 2e− → 2Ag(s)
| +1.17
|
ClO3−(aq) + 2H+ + e− → ClO2(g) + H2O
| +1.18
|
ClO2(g) + H+ + e− → HClO2(aq)
| +1.19
|
2IO3−(aq) + 12H+ + 10e− → I2(s) + 6H2O
| +1.20
|
ClO4−(aq) + 2H+ + 2e− → ClO3−(aq) + H2O
| +1.20
|
O2(g) + 4H+ + 4e− → 2H2O
| +1.23
|
MnO2(s) + 4H+ + 2e− → Mn2+(aq) + 2H2O
| +1.23
|
Tl3+(aq) + 2e− → Tl+(aq)
| +1.25
|
Cl2(g) + 2e− → 2Cl−(aq)
| +1.36
|
Cr2O72−(aq) + 14H+ + 6e− → 2Cr3+(aq) + 7H2O
| +1.36
|
CoO2(s) + 4H+ + e− → Co3+(aq) + 2H2O
| +1.42
|
2HIO(aq) + 2H+ + 2e− → I2(s) + 2H2O
| +1.44
|
BrO3−(aq) + 5H+ + 4e− → HBrO(aq) + 2H2O
| +1.45
|
2BrO3− + 12H+ + 10e− → Br2(l) + 6H2O
| +1.48
|
2ClO3− + 12H+ + 10e− → Cl2(g) + 6H2O
| +1.49
|
MnO4−(aq) + 8H+ + 5e− → Mn2+(aq) + 4H2O
| +1.51
|
HO2• + H+ + e− → H2O2(aq)
| +1.51
|
Au3+(aq) + 3e− → Au(s)
| +1.52
|
NiO2(s) + 4H+ + 2e− → Ni2+(aq)
| +1.59
|
2HClO(aq) + 2H+ + 2e− → Cl2(g) + 2H2O
| +1.63
|
Ag2O3(s) + 6H+ + 4e− → 2Ag+(aq) + 3H2O
| +1.67
|
HClO2(aq) + 2H+ + 2e− → HClO(aq) + H2O
| +1.67
|
Pb4+(aq) + 2e− → Pb2+(aq)
| +1.69
|
MnO4−(aq) + 4H+ + 3e− → MnO2(s) + 2H2O
| +1.70
|
H2O2(aq) + 2H+ + 2e− → 2H2O
| +1.76
|
AgO(s) + 2H+ + e− → Ag+(aq) + H2O
| +1.77
|
Au+(aq) + e− → Au(s)
| +1.83
|
BrO4−(aq) + 2H+ + 2e− → BrO3−(aq) + H2O
| +1.85
|
Co3+(aq) + e− → Co2+(aq)
| +1.92
|
Ag2+(aq) + e− → Ag+(aq)
| +1.98
|
S2O82− + 2e– → 2SO42−
| +2.07
|
HMnO4−(aq) + 3H+ + 2e− → MnO2(s) + 2H2O
| +2.09
|
F2(g) + 2e− → 2F−(aq)
| +2.87
|
F2(g) + 2H+ + 2e− → 2HF(aq)
| +3.05
|