Standard Reduction Potentials at 25oC *
Half-Reactions
F2(g) + 2e- ↔ 2F- (aq)
Co3+(aq) + e- ↔ Co2+(aq)
H2O2(aq) + 2H+ 2e- ↔ 2H2O(l)
MnO4-(aq) + 8H+ + 5e- ↔ Mn2+(aq) + 4H2O(l)
Cl2(g) + 2e- ↔ 2Cl-(aq)
Cr2O72-(aq) + 14H+ + 6e- ↔ 2Cr3+(aq) + 7H2O(l)
O2(g) + 4H+(aq) + 4e- ↔ 2H2O(l)
Br2(l) + 2e- ↔ 2Br-(aq)
NO3-(aq) + 4H+(aq) + 3e- ↔ NO(g) + 2H2O(l)
Hg2+(aq) + 2e- ↔ Hg(l)
Ag+(aq) + e- ↔ Ag(s)
Fe3+(aq) + e- ↔ Fe+2(aq
O2(g) + 4H+(aq) + 2e- ↔ H2O2(aq)
I2(s) + 2e- ↔ 2I- (aq)
O2(g) + 2H2O(l) + 2e- ↔ 4OH- (aq)
Cu2+(aq) + 2e- ↔ Cu(s)
2H+(aq) + 2e- ↔ H2(g)
Pb2+ (aq) + 2e- ↔ Pb(s)
Sn+2(aq) + 2e- ↔ Sn(s)
Ni2+(aq) + 2e- ↔ Ni(s)
Co2+(aq) 2e- ↔ Co(s)
Cd2+ + 2e- ↔ Cd(s)
Fe2+ + 2e- ↔ Fe(s)
Cr3+(aq) + 3e- ↔ Cr(s)
Zn2+ + 2e- ↔ Zn(s)
2H2O(l) + 2e- ↔ H2(g) + 2OH- (aq)
Mn2+ (aq) + 2e- ↔ Mn(s)
Al3+ (aq) + 3e- ↔ Al(s)
Mg2+ (aq) + 2e- ↔ Mg(s)
Na+ (aq) + e- ↔ Na(s)
K+ (aq) + e- ↔ K(s)
Li+ (aq) + e- ↔ Li(s)
•
Eo , Volts
+2.87
+1.84
+1.78
+1.49
+ 1.36
+1.33
+1.23
+1.07
+0.96
+0.85
+0.80
+0.77
+0.68
+0.54
+0.40
+0.34
0.00
-0.13
-0.14
-0.23
-0.28
-0.40
-0.41
-0.74
-0.76
-0.83
-1.03
-1.66
-2.38
-2.71
-2.92
-3.04
For all half-reactions the concentration of dissolved species is 1.00 M and the
pressure of all gases is 1.00 atmospheres (atm).
1