Standard Electrode Potentials

Standard reduction potentials (E° vs. SHE, 25°C, aqueous) for ~1,032 half-reactions covering elements from actinium to xenon plus common electrode systems (calomel). Used for corrosion potential calculations, electrochemical cell EMF, galvanic coupling analysis, and electroplating/electrolysis design.

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(CN)2 + 2 H+ + 2 e ⇌ 2 HCN to Calomel electrode, 0.1 molar KCl5 rows ClO₃⁻ + 3 H₂O + 6 e⁻ ⇌ Cl⁻ + 6 OH⁻ to HgO + H₂O + 2 e⁻ ⇌ Hg + 2 OH⁻5 rows IO⁻ + H₂O + 2 e⁻ ⇌ I⁻ + 2 OH⁻ to PtO3 + 4 H⁺ + 2 e ⇌ Pt(OH)2²⁺ + H2O5 rows S2O8²⁻ + 2 e ⇌ 2 SO4²⁻ to Zn²⁺ + 2 e ⇌ Zn5 rows

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