O-LevelChemistryElectrolysis5070/11 · May/June 2021 · Q131 Mark
An aqueous mixture of copper(II) nitrate and silver nitrate is electrolysed with pure copper electrodes. Which half-equation correctly describes the change occurring at the anode?
ACu → Cu²⁺ + 2e⁻
BCu²⁺ + 2e⁻ → Cu
CAg → Ag⁺ + e⁻
DAg⁺ + e⁻ → Ag
✓ Correct answer
A: Cu → Cu²⁺ + 2e⁻
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