Relative Strengths of Oxidizing and Reducing Agents
Half Reaction Equation
F2(g) + 2e2F-(aq)
2PbO2(s) + SO4 (aq) + 2e
PbSO4(s) + 2H2O(l)
MnO4-(aq) + 8H+(aq) + 5eMn2+(aq) + 4H2O(l)
3+
Au (aq) + 3e
Au(s)
ClO4-(aq) + 8H+(aq) + 8eCl-(aq) + 4H2O(l)
Cl2(g) + 2e2Cl-(aq)
2HNO2(aq) + 4H+(aq) + 4eN2O(g) + 3H2O(l)
2+
Cr2O7 (aq) 14H (aq) + 6e
2Cr3+(aq) + 7H2O(l)
+
O2(g) + 4H (aq) + 4e
2H2O(l)
MnO2(s) + 4H+(aq) + 2eMn2+(aq) + 2H2O(l)
2IO3-(aq) + 12H+(aq) + 10eI2(s) + 6H2O(l)
Br2(l) + 2e2Br-(aq)
Hg(aq) + 2eHg(l)
ClO (aq) + H2O(l) + 2eCl-(aq) + 2OH-(aq)
Ag+(aq) + eAg(s)
NO3 (aq) 2H+(aq) + eNO2(g) + H2O(l)
Fe3+(aq) + eFe2+ (aq)
O2(g) + 2H+(aq) + 2eH2O2(l)
MnO4 (aq) + 2H2O(l) + 3e
MnO2(s) + 4OH-(aq)
I2(s) + 2e
2I-(aq)
+
Cu (aq) + e
Cu(s)
O2(aq) + 2H2O(l) + 4e4OH-(aq)
2+
Cu (aq) + 2e
Cu(s)
2+
SO4 (aq) + 4H (aq) + 2e
H2SO3(aq) + H2O(l)
Sn2+(aq) + 2eSn2+(aq)
2+
Cu (aq) + e
Cu+(aq)
+
S(s) + 2H (aq) + 2e
H2S(aq)
AgBr(s) + eAg(s) + Br-(aq)
2H+(aq) + 2eH2(g)
2+
Pb (aq) + 2e
Pb(s)
Sn2+(aq) + 2eSn(s)
AgI(s) + eAg(s) + I-(aq)
Ni2+(aq) + 2eNi(s)
Co2+(aq) + 2eCo(s)
H3PO4(aq) + 2H+(aq) + 2eH3PO3(aq) + H2O(l)
PbSO4(aq) + 2ePb(s) + SO42-(aq)
+
Se(s) + 2H (aq) + 2e
H2Se(aq)
Cd2+(aq) + 2eCd(s)
Cr3+(aq) + eCr2+(aq)
2+
Fe (aq) + 2e
Fe(s)
AgS(aq) + 2e
2Ag(s) + S2-(aq)
2+
Zn (aq) + 2e
Zn(s)
Te(s) + 2H+(aq) + 2eH2Te(aq)
2H2O(l) + 2eH2(g) + 2OH-(aq)
Cr2+(aq) + 2eCr(s)
SO42-(aq) + H2O(l) + 2eSO32-(aq) + 2OH-(aq)
Al3+(aq) + 3eAl(s)
Mg2+(aq) + 2eMg(s)
Na+(aq) + eNa(s)
Ca2+(aq) + 2eCa(s)
Ba2+(aq) + 2eBa(s)
K+(aq) + eK(s)
Li+(aq) + eLi(s)
Eo (V)
+2.87
+1.69
+1.51
+1.50
+1.39
+1.36
+1.30
+1.23
+1.23
+1.22
+1.20
+1.07
+0.85
+0.84
+0.80
+0.80
+0.77
+0.70
+0.60
+0.54
+0.52
+0.40
+0.34
+0.17
+0.15
+0.15
+0.14
+0.07
0.00
-0.13
-0.14
-0.15
-0.26
-0.28
-0.28
-0.36
-0.40
-0.40
-0.41
-0.44
-0.69
-0.76
-0.79
-0.83
-0.91
-0.93
-1.66
-2.37
-2.71
-2.87
-2.91
-2.93
-3.04