Appendices

Standard Electrode (Half-Cell) Potentials

Half-Reaction E° (V)
[latex]\ce{Ag+} + \ce{e-} \longrightarrow \ce{Ag}[/latex] +0.7996
[latex]\ce{AgCl} + \ce{e-} \longrightarrow \ce{Ag} + \ce{Cl-}[/latex] +0.22233
[latex]\ce{[Ag(CN)2]-} + \ce{e-} \longrightarrow \ce{Ag} + \ce{2CN-}[/latex] –0.31
[latex]\ce{Ag2CrO4} + \ce{2e-} \longrightarrow \ce{2Ag} + \ce{CrO_{4}^2-}[/latex] +0.45
[latex]\ce{[Ag(NH3)2]+} + \ce{e-} \longrightarrow \ce{Ag} + \ce{2NH3}[/latex] +0.373
[latex]\ce{[Ag(S2O3)2]^3+} + \ce{e-} \longrightarrow \ce{Ag} + \ce{2S2O3^2-}[/latex] +0.017
[latex]\ce{[AlF6]^3-} + \ce{3e-} \longrightarrow \ce{Al} + \ce{6F-}[/latex] –2.07
[latex]\ce{Al^3+} + \ce{3e-} \longrightarrow \ce{Al}[/latex] –1.662
[latex]\ce{Am^3+} + \ce{3e-} \longrightarrow \ce{Am}[/latex] –2.048
[latex]\ce{Au^3+} + \ce{3e-} \longrightarrow \ce{Au}[/latex] +1.498
[latex]\ce{Au+} + \ce{e-} \longrightarrow \ce{Au}[/latex] +1.692
[latex]\ce{Ba+} + \ce{2e-} \longrightarrow \ce{Ba}[/latex] –2.912
[latex]\ce{Be+} + \ce{2e-} \longrightarrow \ce{Be}[/latex] –1.847
[latex]\ce{Br2} (aq) + \ce{2e-} \longrightarrow \ce{2Br-}[/latex] +1.0873
[latex]\ce{Ca+} + \ce{2e-} \longrightarrow \ce{Ca}[/latex] –2.868
[latex]\ce{Ce^3} + \ce{3e-} \longrightarrow \ce{Ce}[/latex] –2.483
[latex]\ce{Ce^4+} + \ce{e-} \longrightarrow \ce{Ce^3+}[/latex] +1.61
[latex]\ce{Cd+} + \ce{2e-} \longrightarrow \ce{Cd}[/latex] –0.4030
[latex]\ce{[Cd(CN)4]^2-} + \ce{2e-} \longrightarrow \ce{Cd} + \ce{4CN-}[/latex] –1.09
[latex]\ce{[Cd(NH3)4]+} + \ce{2e-} \longrightarrow \ce{Cd} + \ce{4NH3}[/latex] –0.61
[latex]\ce{CdS} + \ce{2e-} \longrightarrow \ce{Cd} + \ce{S^2-}[/latex] –1.17
[latex]\ce{Cl2} + \ce{2e-} \longrightarrow \ce{2Cl-}[/latex] +1.35827
[latex]\ce{ClO4-} + \ce{H2O} + \ce{2e-} \longrightarrow \ce{ClO3-} + \ce{2OH-}[/latex] +0.36
[latex]\ce{ClO3-} + \ce{H2O} + \ce{2e-} \longrightarrow \ce{ClO2-} + \ce{2OH-}[/latex] +0.33
[latex]\ce{ClO2-} + \ce{H2O} + \ce{2e-} \longrightarrow \ce{ClO-} + \ce{2OH-}[/latex] +0.66
[latex]\ce{ClO-} + \ce{H2O} + \ce{2e-} \longrightarrow \ce{Cl-} + \ce{2OH-}[/latex] +0.89
[latex]\ce{ClO4-} + \ce{2H+} + \ce{2e-} \longrightarrow \ce{ClO3-} + \ce{H2O}[/latex] +1.189
[latex]\ce{ClO3-} + \ce{3H+} + \ce{2e-} \longrightarrow \ce{HClO2} + \ce{H2O}[/latex] +1.21
[latex]\ce{HClO} + \ce{H+} + \ce{2e-} \longrightarrow \ce{Cl-} + \ce{H2O}[/latex] +1.482
[latex]\ce{HClO} + \ce{H+} + \ce{e-} \longrightarrow \ce{1/2Cl2} + \ce{H2O}[/latex] +1.611
[latex]\ce{HClO2} + \ce{2H+} + \ce{2e-} \longrightarrow \ce{HClO} + \ce{H2O}[/latex] +1.628
[latex]\ce{Co^3+} + \ce{e-} \longrightarrow \ce{Co+} (\text{2 mol // }\ce{H2SO4})[/latex] +1.83
[latex]\ce{Co+} + \ce{2e-} \longrightarrow \ce{Co}[/latex] –0.28
[latex]\ce{[Co(NH3)6]^3+} + \ce{e-} \longrightarrow \ce{[Co(NH3)6]+}[/latex] +0.1
[latex]\ce{Co(OH)3} + \ce{e-} \longrightarrow \ce{Co(OH)2} + \ce{OH-}[/latex] +0.17
[latex]\ce{Cr^3} + \ce{3e-} \longrightarrow \ce{Cr}[/latex] –0.744
[latex]\ce{Cr^3+} + \ce{e-} \longrightarrow \ce{Cr+}[/latex] –0.407
[latex]\ce{Cr+} + \ce{2e-} \longrightarrow \ce{Cr}[/latex] –0.913
[latex]\ce{[Cu(CN)2]-} + \ce{e-} \longrightarrow \ce{Cu} + \ce{2CN-}[/latex] –0.43
[latex]\ce{CrO4^2-} + \ce{4H2O} + \ce{3e-} \longrightarrow \ce{Cr(OH)3} + \ce{5OH-}[/latex] –0.13
[latex]{\text{Cr}}_{2}{\text{O}}_{7}{}^{2-}+14{\text{H}}^{+}+6{\text{e}}^{-}\rightarrow 2{\text{Cr}}^{3+}+7{\text{H}}_{2}\text{O}[/latex]

[latex]\ce{Cr2O7^2-} + \ce{14H+} + \ce{6e-} \longrightarrow \ce{2Cr^3+} + \ce{7H2O}[/latex]

+1.232
[latex]\ce{[Cr(OH)4]-} + \ce{3e-} \longrightarrow \ce{Cr} + \ce{4OH-}[/latex] –1.2
[latex]\ce{Cr(OH)3} + \ce{3e-} \longrightarrow \ce{3OH-}[/latex] –1.48
[latex]\ce{Cu+} + \ce{e-} \longrightarrow \ce{Cu+}[/latex] +0.153
[latex]\ce{Cu+} + \ce{2e-} \longrightarrow \ce{Cu}[/latex] +0.34
[latex]\ce{Cu+} + \ce{e-} \longrightarrow \ce{Cu}[/latex] +0.521
[latex]\ce{F2} + \ce{2e-} \longrightarrow \ce{2F-}[/latex] +2.866
[latex]\ce{Fe+} + \ce{2e-} \longrightarrow \ce{Fe}[/latex] –0.447
[latex]\ce{Fe^3+} + \ce{e-} \longrightarrow \ce{Fe+}[/latex] +0.771
[latex]\ce{[Fe(CN)6]^3-} + \ce{e-} \longrightarrow \ce{[Fe(CN)6]^4-}[/latex] +0.36
[latex]\ce{Fe(OH)2} + \ce{2e-} \longrightarrow \ce{2OH-}[/latex] –0.88
[latex]\ce{FeS} + \ce{2e-} \longrightarrow \ce{Fe} + \ce{S^2-}[/latex] –1.01
[latex]\ce{Ga^3+} + \ce{3e-} \longrightarrow \ce{Ga}[/latex] –0.549
[latex]\ce{Gd^3+} + \ce{3e-} \longrightarrow \ce{Gd}[/latex] –2.279
[latex]\ce{1/2H2} + \ce{e-} \longrightarrow \ce{H-}[/latex] –2.23
[latex]\ce{2H2O} + \ce{2e-} \longrightarrow \ce{H2} + \ce{2OH-}[/latex] –0.8277
[latex]\ce{H2O2} + \ce{2H+} + \ce{2e-} \longrightarrow \ce{2H2O}[/latex] +1.776
[latex]\ce{2H+} + \ce{2e-} \longrightarrow \ce{H2}[/latex] 0.00
[latex]\ce{HO2-} + \ce{H2O} + \ce{2e-} \longrightarrow \ce{3OH-}[/latex] +0.878
[latex]\ce{Hf^4+} + \ce{4e-} \longrightarrow \ce{Hf}[/latex] –1.55
[latex]\ce{Hg+} + \ce{2e-} \longrightarrow \ce{Hg}[/latex] +0.851
[latex]\ce{2Hg+} + \ce{2e-} \longrightarrow \ce{Hg2+}[/latex] +0.92
[latex]\ce{Hg2+} + \ce{2e-} \longrightarrow \ce{2Hg}[/latex] +0.7973
[latex]\ce{[HgBr4]^2-} + \ce{2e-} \longrightarrow \ce{Hg} + \ce{4Br-}[/latex] +0.21
[latex]\ce{Hg2Cl2} + \ce{2e-} \longrightarrow \ce{2Hg} + \ce{2Cl-}[/latex] +0.26808
[latex]\ce{[Hg(CN)4]^2-} + \ce{2e-} \longrightarrow \ce{Hg} + \ce{4CN-}[/latex] –0.37
[latex]\ce{[HgI4]^2-} + \ce{2e-} \longrightarrow \ce{Hg} + \ce{4I-}[/latex] –0.04
[latex]\ce{HgS} + \ce{2e-} \longrightarrow \ce{Hg} + \ce{S^2-}[/latex] –0.70
[latex]\ce{I2} + \ce{2e-} \longrightarrow \ce{2I-}[/latex] +0.5355
[latex]\ce{In^3+} + \ce{3e-} \longrightarrow \ce{In}[/latex] –0.3382
[latex]\ce{K+} + \ce{e-} \longrightarrow \ce{K}[/latex] –2.931
[latex]\ce{La^3+} + \ce{3e-} \longrightarrow \ce{La}[/latex] –2.52
[latex]\ce{Li+} + \ce{e-} \longrightarrow \ce{Li}[/latex] –3.04
[latex]\ce{Lu^3+} + \ce{3e-} \longrightarrow \ce{Lu}[/latex] –2.28
[latex]\ce{Mg+} + \ce{2e-} \longrightarrow \ce{Mg}[/latex] –2.372
[latex]\ce{Mn+} + \ce{2e-} \longrightarrow \ce{Mn}[/latex] –1.185
[latex]\ce{MnO2} + \ce{2H2O} + \ce{2e-} \longrightarrow \ce{Mn(OH)2} + \ce{2OH-}[/latex] –0.05
[latex]\ce{MnO4-} + \ce{2H2O} + \ce{3e-} \longrightarrow \ce{MnO2} + \ce{4OH-}[/latex] +0.558
[latex]\ce{MnO2} + \ce{4H+} + \ce{2e-} \longrightarrow \ce{Mn^2+} + \ce{2H2O}[/latex] +1.23
[latex]\ce{MnO4-} + \ce{8H+} + \ce{5e-} \longrightarrow \ce{Mn^2+} + \ce{4H2O}[/latex] +1.507
[latex]\ce{Na+} + \ce{3e-} \longrightarrow \ce{Na}[/latex] –2.71
[latex]\ce{Nd^3+} + \ce{3e-} \longrightarrow \ce{Nd}[/latex] –2.323
[latex]\ce{Ni+} + \ce{2e-} \longrightarrow \ce{Ni}[/latex] –0.257
[latex]\ce{[Ni(NH3)6]+} + \ce{2e-} \longrightarrow \ce{Ni} + \ce{6NH3}[/latex] –0.49
[latex]\ce{NiO2} + \ce{4H+} + \ce{2e-} \longrightarrow \ce{Ni^{2+}} + \ce{2H2O}[/latex] +1.593
[latex]\ce{NiO2} + \ce{2H2O} + \ce{2e-} \longrightarrow \ce{Ni(OH)2} + \ce{2OH-}[/latex] +0.49
[latex]\ce{NiS} + \ce{2e-} \longrightarrow \ce{Ni} + \ce{S^2-}[/latex] +0.76
[latex]\ce{NO3-} + \ce{4H+} + \ce{3e-} \longrightarrow \ce{NO} + \ce{2H2O}[/latex] +0.957
[latex]\ce{NO3-} + \ce{3H+} + \ce{2e-} \longrightarrow \ce{HNO2} + \ce{H2O}[/latex] +0.92
[latex]\ce{NO3-} + \ce{H2O} + \ce{2e-} \longrightarrow \ce{NO2-} + \ce{2OH-}[/latex] +0.10
[latex]\ce{Np^3} + \ce{3e-} \longrightarrow \ce{Np}[/latex] –1.856
[latex]\ce{O2} + \ce{2H2O} + \ce{4e-} \longrightarrow \ce{4OH-}[/latex] +0.401
[latex]\ce{O2} + \ce{2H+} + \ce{2e-} \longrightarrow \ce{H2O2}[/latex] +0.695
[latex]\ce{O2} + \ce{4H+} + \ce{4e-} \longrightarrow \ce{2H2O}[/latex] +1.229
[latex]\ce{Pb+} + \ce{2e-} \longrightarrow \ce{Pb}[/latex] –0.1262
[latex]\ce{PbO2} + \ce{SO4^2-} + \ce{4H+} + \ce{2e-} \longrightarrow \ce{PbSO4} + \ce{2H2O}[/latex] +1.69
[latex]\ce{PbS} + \ce{2e-} \longrightarrow \ce{Pb} + \ce{S^2-}[/latex] –0.95
[latex]\ce{PbSO4} + \ce{2e-} \longrightarrow \ce{Pb} + \ce{{SO4}^2-}[/latex] –0.3505
[latex]\ce{Pd+} + \ce{2e-} \longrightarrow \ce{Pd}[/latex] +0.987
[latex]\ce{[PdCl4]^2-} + \ce{2e-} \longrightarrow \ce{Pd} + \ce{4Cl-}[/latex] +0.591
[latex]\ce{Pt+} + \ce{2e-} \longrightarrow \ce{Pt}[/latex] +1.20
[latex]\ce{[PtBr4]^2-} + \ce{2e-} \longrightarrow \ce{Pt} + \ce{4Br-}[/latex] +0.58
[latex]\ce{[PtCl4]^2-} + \ce{2e-} \longrightarrow \ce{Pt} + \ce{4Cl-}[/latex] +0.755
[latex]\ce{[PtCl6]^2-} + \ce{2e-} \longrightarrow \ce{[PtCl4]^2-} + \ce{2Cl-}[/latex] +0.68
[latex]\ce{Pu^3} + \ce{3e-} \longrightarrow \ce{Pu}[/latex] –2.03
[latex]\ce{Ra+} + \ce{2e-} \longrightarrow \ce{Ra}[/latex] –2.92
[latex]\ce{Rb+} + \ce{e-} \longrightarrow \ce{Rb}[/latex] –2.98
[latex]\ce{[RhCl6]^3-} + \ce{3e-} \longrightarrow \ce{Rh} + \ce{6Cl-}[/latex] +0.44
[latex]\ce{S} + \ce{2e-} \longrightarrow \ce{S^{2-}}[/latex] –0.47627
[latex]\ce{S} + \ce{2H+} + \ce{2e-} \longrightarrow \ce{H2S}[/latex] +0.142
[latex]\ce{Sc^{3+}} + \ce{3e-} \longrightarrow \ce{Sc}[/latex] –2.09
[latex]\ce{Se} + \ce{2H+} + \ce{2e-} \longrightarrow \ce{H2Se}[/latex] –0.399
[latex]\ce{[SiF6]^{2-}} + \ce{4e-} \longrightarrow \ce{Si} + \ce{6F-}[/latex] –1.2
[latex]\ce{SiO3^{2-}} + \ce{3H2O} + \ce{4e-} \longrightarrow \ce{Si} + \ce{6OH-}[/latex] –1.697
[latex]\ce{SiO2} + \ce{4H+} + \ce{4e-} \longrightarrow \ce{Si} + \ce{2H2O}[/latex] –0.86
[latex]\ce{Sm^{3+}} + \ce{3e-} \longrightarrow \ce{Sm}[/latex] –2.304
[latex]\ce{Sn^{4+}} + \ce{2e-} \longrightarrow \ce{Sn+}[/latex] +0.151
[latex]\ce{Sn+} + \ce{2e-} \longrightarrow \ce{Sn}[/latex] –0.1375
[latex]\ce{[SnF6]^{2-}} + \ce{4e-} \longrightarrow \ce{Sn} + \ce{6F-}[/latex] –0.25
[latex]\ce{SnS} + \ce{2e-} \longrightarrow \ce{Sn} + \ce{S^{2-}}[/latex] –0.94
[latex]\ce{Sr+} + \ce{2e-} \longrightarrow \ce{Sr}[/latex] –2.89
[latex]\ce{TeO2} + \ce{4H+} + \ce{4e-} \longrightarrow \ce{Te} + \ce{2H2O}[/latex] +0.593
[latex]\ce{Th^{4+}} + \ce{4e-} \longrightarrow \ce{Th}[/latex] –1.90
[latex]\ce{Ti+} + \ce{2e-} \longrightarrow \ce{Ti}[/latex] –1.630
[latex]\ce{U^{3+}} + \ce{3e-} \longrightarrow \ce{U}[/latex] –1.79
[latex]\ce{V+} + \ce{2e-} \longrightarrow \ce{V}[/latex] –1.19
[latex]\ce{Y^{3+}} + \ce{3e-} \longrightarrow \ce{Y}[/latex] –2.37
[latex]\ce{Zn+} + \ce{2e-} \longrightarrow \ce{Zn}[/latex] –0.7618
[latex]\ce{[Zn(CN)4]^{2-}} + \ce{2e-} \longrightarrow \ce{Zn} + \ce{4CN-}[/latex] –1.26
[latex]\ce{[Zn(NH3)4]+} + \ce{2e-} \longrightarrow \ce{Zn} + \ce{4NH3}[/latex] –1.04
[latex]\ce{Zn(OH)2} + \ce{2e-} \longrightarrow \ce{Zn} + \ce{2OH-}[/latex] –1.245
[latex]\ce{[Zn(OH)4]^2} + \ce{2e-} \longrightarrow \ce{Zn} + \ce{4OH-}[/latex] –1.199
[latex]\ce{ZnS} + \ce{2e-} \longrightarrow \ce{Zn} + \ce{S^{2-}}[/latex] –1.40
[latex]\ce{Zr^4} + \ce{4e-} \longrightarrow \ce{Zr}[/latex] –1.539
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