Standard Reduction (Electrode) Potentials at 25 oC
|
| Half-Cell Reaction |
Eo (volts) |
F2(g) + 2 e-  2 F-(aq) |
2.87 |
| Ce4+(aq) + e- Ce3+(aq) |
1.61 |
| MnO4-(aq) + 8 H+(aq) + 5 e-
Mn2+(aq) + 4 H2O(l) |
1.51 |
| Cl2(g) + 2 e- 2 Cl-(aq) |
1.36 |
| Cr2O72-(aq) + 14 H+(aq) + 6 e-
2 Cr3+(aq) + 7 H2O(l) |
1.33 |
| O2(g) + 4 H+(aq) + 4 e-
2 H2O(l) |
1.229 |
| Br2(l) + 2 e- 2 Br-(aq) |
1.08 |
| NO3-(aq) + 4 H+(aq) + 3 e-
NO(g) + 2 H2O(l) |
0.96 |
| 2 Hg2+(aq) + 2 e- Hg22+(aq) |
0.920 |
| Hg2+(aq) + 2 e- Hg(l) |
0.855 |
| Ag+(aq) + e- Ag(s) |
0.799 |
| Hg22+(aq) + 2 e-
2 Hg(l) |
0.789 |
| Fe3+(aq) + e- Fe2+(aq) |
0.771 |
| I2(s) + 2 e- 2 I-(aq) |
0.535 |
| Fe(CN)63-(aq) + e-
Fe(CN)64-(aq) |
0.48 |
| Cu2+(aq) + 2 e- Cu(s) |
0.337 |
| Cu2+(aq) + e- Cu+(aq) |
0.153 |
| S(s) + 2 H+(aq) + 2 e- H2S(aq) |
0.14 |
| 2 H+(aq) + 2 e- H2(g) |
0.0000 |
| Pb2+(aq) + 2 e- Pb(s) |
-0.126 |
| Sn2+(aq) + 2 e- Sn(s) |
-0.14 |
| Ni2+(aq) + 2 e- Ni(s) |
-0.25 |
| Co2+(aq) + 2 e- Co(s) |
-0.28 |
| Cd2+(aq) + 2 e- Cd(s) |
-0.403 |
| Cr3+(aq) + e- Cr2+(aq) |
-0.41 |
| Fe2+(aq) + 2 e- Fe(s) |
-0.44 |
| Cr3+(aq) + 3 e- Cr(s) |
-0.74 |
| Zn2+(aq) + 2 e- Zn(s) |
-0.763 |
| 2 H2O(l) + 2 e- H2(g)
+ 2 OH-(aq) |
-0.83 |
| Mn2+(aq) + 2 e- Mn(s) |
-1.18 |
| Al3+(aq) + 3 e- Al(s) |
-1.66 |
| Mg2+(aq) + 2 e- Mg(s) |
-2.37 |
| Na+(aq) + e- Na(s) |
-2.714 |
| K+(aq) + e- K(s) |
-2.925 |
| Li+(aq) + e- Li(s) |
-3.045 |
2 F-(aq)