STANDARD ELECTRODE POTENTIALS
| Half-Reaction |  |
Li+ + e-  Li |
-3.04 |
| K+ + e- K |
-2.92 |
| Ba2+ + 2e- Ba |
-2.90 |
| Ca2+ + 2e- Ca |
-2.87 |
| Na+ + e- Na |
-2.71 |
| Mg2+ + 2e- Mg |
-2.37 |
| Al3+ + 3e- Al |
-1.66 |
| Mn2+ + 2e- Mn |
-1.18 |
| 2H2O + 2e- H2
(g) + 2 OH- |
-0.83 |
| Zn2+ + 2e- Zn |
-0.76 |
| Cr2+ + 2e- Cr |
-0.74 |
| Fe2+ + 2e- Fe |
-0.44 |
| Cr3+ + 3e- Cr |
-0.41 |
| Cd2+ + 2e- Cd |
-0.40 |
| Co2+ + 2e- Co |
-0.28 |
| Ni2+ + 2e- Ni |
-0.25 |
| Sn2+ + 2e- Sn |
-0.14 |
| Pb2+ + 2e- Pb |
-0.13 |
| Fe3+ + 3e- Fe |
-0.04 |
| 2H+ + 2e-
H2
(g) |
0.00 |
| S + 2H+ + 2e-
H2S
(g) |
0.14 |
| Sn4+ + 2e- Sn2+ |
0.15 |
| Cu2+ + e- Cu+ |
0.16 |
| SO42+ + 4H+ + 2e-
SO2
(g) + 2H2O |
0.17 |
| Cu2+ + 2e- Cu |
0.34 |
| 2H2O + O2 + 4e- 4OH- |
0.40 |
| Cu+ + e- Cu |
0.52 |
| I2 + 2e- 2I- |
0.54 |
| O2 (g) + 2H+ + 2e- H2O2 |
0.68 |
| Fe3+ + e- Fe2+
|
0.77 |
| NO3- + 2H+ + e-
NO2 (g)
+ H2O |
0.78 |
| Hg2+ + 2e- Hg (l) |
0.78 |
| Ag+ + e- Ag |
0.80 |
| NO3- + 4H+ +3 e-
NO (g)
+ 2H2O |
0.96 |
| Br2 + 2e- 2Br- |
1.06 |
| O2 (g) + 4H+ + 4e- 2H2O |
1.23 |
| MnO2 + 4H+ + 2e- Mn2+
+ 2H2O |
1.28 |
| Cr2O72- + 14H+
+ 6e- 2Cr3+ + 7H2O |
1.33 |
| Cl2 + 2e- 2Cl- |
1.36 |
| Au3+ + 3e- Au |
1.50 |
| MnO4- + 8H+ + 5e-
Mn2+
+ 4H2O |
1.52 |
| Co3+ + e- Co2+ |
1.82 |
| F2 + 2e- 2F- |
2.87 |