TabelasPotencialPadrao

DATA SECTION

1005

Table 7.2 Standard potentials at 298 K. (a) In electrochemical order
Reduction half-reaction

E 7/V

Strongly oxidizing
+

Reduction half-reaction

E 7/V

Cu2+ + e− → Cu+

+0.16

−

H4XeO6 + 2H + 2e → XeO3 + 3H2O
F2 + 2e− → 2F −
O3 + 2H+ + 2e− → O2 + H2O
S2O82− + 2e− → 2SO42−
Ag 2+ + e− → Ag+
Co3+ + e− → Co2+
H2O2 + 2H+ + 2e− → 2H2O
Au+ + e− → Au
Pb4+ + 2e− → Pb2+
2HClO + 2H+ + 2e− → Cl2 + 2H2O
Ce4+ + e− → Ce3+

+3.0
+2.87
+2.07
+2.05
+1.98
+1.81
+1.78
+1.69
+1.67
+1.63
+1.61

Sn4+ + 2e− → Sn2+
AgBr + e− → Ag + Br−
Ti4+ + e− → Ti3+
2H+ + 2e− → H2
Fe3+ + 3e− → Fe
O2 + H2O + 2e− → HO2− + OH−
Pb2+ + 2e− → Pb
In+ + e− → In
Sn2+ + 2e− → Sn
AgI + e− → Ag + I−
Ni2+ + 2e− → Ni

+0.15
+0.07
0.00
0, by definition
−0.04
−0.08
−0.13
−0.14
−0.14
−0.15
−0.23

2HBrO + 2H+ + 2e− → Br2 + 2H2O
MnO4− + 8H+ + 5e− → Mn2+ + 4H2O
Mn3+ + e− → Mn2+
Au3+ + 3e− → Au
Cl2 + 2e− → 2Cl −
Cr2O72− + 14H+ + 6e− → 2Cr 3+ + 7H2O
O3 + H2O + 2e− → O2 + 2OH−
O2 + 4H+ + 4e− → 2H2O
ClO4− + 2H+ + 2e− → ClO3− + H2O
MnO2 + 4H+ + 2e− → Mn2+ + 2H2O
Br2 + 2e− → 2Br−
Pu4+ + e− → Pu3+
NO3− + 4H+ + 3e− → NO + 2H2O
2Hg 2+ + 2e− → Hg 22+
ClO− + H2O + 2e− → Cl− + 2OH−
Hg 2+ + 2e− → Hg
NO3− + 2H+ + e− → NO2 + H2O
Ag+ + e− → Ag
−
Hg2+
2 + 2e → 2Hg
3+
−
Fe + e → Fe2+
BrO− + H2O + 2e− → Br− + 2OH−
Hg2SO4 + 2e− → 2Hg + SO42−
−
−
MnO2−
4 + 2H2O + 2e → MnO2 + 4OH
−
2−
−
MnO4 + e → MnO4
I2 + 2e− → 2I−
CU+ + e− → Cu
I3− + 2e− → 3I−
NiOOH + H2O + e− → Ni(OH)2 + OH−
Ag2CrO4 + 2e− → 2Ag + CrO42−
O2 + 2H2O + 4e− → 4OH−
ClO4− + H2O + 2e− → ClO3− + 2OH−
[Fe(CN)6]3− + e− → [Fe(CN)6]4−
Cu2+ + 2e− → Cu
Hg2Cl2 + 2e− → 2Hg + 2Cl−
AgCl + e− → Ag + Cl−
Bi3+ + 3e− → Bi

+1.60
+1.51
+1.51
+1.40
+1.36
+1.33
+1.24
+1.23
+1.23
+1.23
+1.09
+0.97
+0.96
+0.92
+0.89
+0.86
+0.80
+0.80
+0.79
+0.77
+0.76
+0.62
+0.60
+0.56
+0.54
+0.52
+0.53
+0.49
+0.45
+0.40
+0.36
+0.36
+0.34
+0.27
+0.22
+0.20

Co2+ + 2e− → Co
In3+ + 3e− → In
Tl+ + e− → Tl
PbSO4 + 2e− → Pb + SO42−
Ti3+ + e− → Ti2+
Cd2+ + 2e− → Cd
In2+ + e− → In+
Cr3+ + e− → Cr 2+