Cathode (Reduction)
Half-Reaction
|
Standard Potential
E° (volts)
|
| Li+(aq) + e- → Li(s) |
-3.04 |
| K+(aq) + e- → K(s) |
-2.92 |
| Ca2+(aq) + 2e- → Ca(s) |
-2.76 |
| Na+(aq) + e- → Na(s) |
-2.71 |
| Mg2+(aq) + 2e- → Mg(s) |
-2.38 |
| Al3+(aq) + 3e- → Al(s) |
-1.66 |
| 2H2O(l) + 2e- → H2(g) + 2OH-(aq) |
-0.83 |
| Zn2+(aq) + 2e- → Zn(s) |
-0.76 |
| Cr3+(aq) + 3e- → Cr(s) |
-0.74 |
| Fe2+(aq) + 2e- → Fe(s) |
-0.41 |
| Cd2+(aq) + 2e- → Cd(s) |
-0.40 |
| Ni2+(aq) + 2e- → Ni(s) |
-0.23 |
| Sn2+(aq) + 2e- → Sn(s) |
-0.14 |
| Pb2+(aq) + 2e → Pb(s) |
-0.13 |
| Fe3+(aq) + 3e- → Fe(s) |
-0.04 |
| 2H+(aq) + 2e- → H2(g) |
0.00 |
| Sn4+(aq) + 2e- → Sn2+(aq) |
0.15 |
| Cu2+(aq) + e- → Cu+(aq) |
0.16 |
| ClO4-(aq) + H2O(l) + 2e- → ClO3-(aq) + 2OH-(aq) |
0.17 |
| AgCl(s) + e- → Ag(s) + Cl-(aq) |
0.22 |
| Cu2+(aq) + 2e- → Cu(s) |
0.34 |
| ClO3-(aq) + H2O(l) + 2e- → ClO2-(aq) + 2OH-(aq) |
0.35 |
| IO-(aq) + H2O(l) + 2e- → I-(aq) + 2OH-(aq) |
0.49 |
| Cu+(aq) + e- → Cu(s) |
0.52 |
| I2(s) + 2e- → 2I-(aq) |
0.54 |
| ClO2-(aq) + H2O(l) + 2e- → ClO-(aq) + 2OH-(aq) |
0.59 |
| Fe3+(aq) + e- → Fe2+(aq) |
0.77 |
| Hg22+(aq) + 2e- → 2Hg(l) |
0.80 |
| Ag+(aq) + e- → Ag(s) |
0.80 |
| Hg2+(aq) + 2e- → Hg(l) |
0.85 |
| ClO-(aq) + H2O(l) + 2e- → Cl-(aq) + 2OH-(aq) |
0.90 |
| 2Hg2+(aq) + 2e- → Hg22+(aq) |
0.90 |
| NO3-(aq) + 4H+(aq) + 3e- → NO(g) + 2H2O(l) |
0.96 |
| Br2(l) + 2e- → 2Br-(aq) |
1.07 |
| O2(g) + 4H+(aq) + 4e- → 2H2O(l) |
1.23 |
| MnO2(g) + 4H+(aq) + 2e- → Mn2+ + 2H2O(l) |
1.23 |
| Cr2O72-(aq) + 14H+(aq) + 6e- → 2Cr3+(aq) + 7H2O(l) |
1.33 |
| Cl2(g) + 2e- → 2Cl-(aq) |
1.36 |
| Ce4+(aq) + e- → Ce3+(aq) |
1.44 |
| MnO4-(aq) + 8H+(aq) + 5e- → Mn2+(aq) + 4H2O(l) |
1.49 |
| H2O2(aq) + 2H+(aq) + 2e- → 2H2O(l) |
1.78 |
| Co3+(aq) + e- → Co2+(aq) |
1.82 |
| S2O82-(aq) + 2e- → 2SO42-(aq) |
2.01 |
| O3(g) + 2H+(aq) + 2e- → O2(g) + H2O(l) |
2.07 |
| F2(g) + 2e- → 2F-(aq) |
2.87 |