Standard Reduction Potentials in Aqueous Solution at 25°C
Cathode (Reduction) Half-Reaction |
Standard Potential E° (volts) |
---|---|
Li+(aq) + e- ![]() |
|
K+(aq) + e- ![]() |
|
Ca2+(aq) + 2e- ![]() |
|
Na+(aq) + e- ![]() |
|
Mg2+(aq) + 2e- ![]() |
|
Al3+(aq) + 3e- ![]() |
|
2H2O(l) + 2e- ![]() |
|
Zn2+(aq) + 2e- ![]() |
|
Cr3+(aq) + 3e- ![]() |
|
Fe2+(aq) + 2e- ![]() |
|
Cd2+(aq) + 2e- ![]() |
|
Ni2+(aq) + 2e- ![]() |
|
Sn2+(aq) + 2e- ![]() |
|
Pb2+(aq) + 2e- ![]() |
|
Fe3+(aq) + 3e- ![]() |
|
2H+(aq) + 2e- ![]() |
|
S4O62-(aq) + 2e- ![]() |
|
Sn4+(aq) + 2e- ![]() |
|
Cu2+(aq) + e- ![]() |
|
ClO4-(aq) + H2O(l)
+ 2e- ![]() |
|
SO42-(aq) + 4H+ + 2e ![]() |
|
AgCl(s) + e- ![]() |
|
Cu2+(aq) + 2e- ![]() |
|
ClO3-(aq) + H2O(l)
+ 2e- ![]() |
|
IO-(aq) + H2O(l) + 2e- ![]() |
|
Cu+(aq) + e- ![]() |
|
I2(s) + 2e- ![]() |
+0.54 |
ClO2-(aq) + H2O(l)
+ 2e- ![]() |
|
Fe3+(aq) + e- ![]() |
|
Hg22+(aq) + 2e- ![]() |
|
Ag+(aq) + e- ![]() |
|
Hg2+(aq) + 2e- ![]() |
|
ClO-(aq) + H2O(l) + 2e- ![]() |
|
2Hg2+(aq) + 2e- ![]() |
|
NO3-(aq) + 4H+(aq) + 3e- ![]() |
|
Br2(l) + 2e- ![]() |
|
O2(g) + 4H+(aq) + 4e- ![]() |
|
Cr2O72-(aq) + 14H+(aq)
+ 6e- ![]() |
|
Cl2(g) + 2e- ![]() |
|
Ce4+(aq) + e- ![]() |
|
MnO4-(aq) + 8H+(aq) + 5e-
![]() |
|
H2O2(aq) + 2H+(aq)
+ 2e- ![]() |
|
Co3+(aq) + e- ![]() |
|
S2O82-(aq) + 2e-
![]() |
|
O3(g) + 2H+(aq) + 2e- ![]() |
|
F2(g) + 2e- ![]() |
|
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