Standard Electrode (Half-Cell) Potentials

A Collective Work

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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