O-LevelChemistryElectrolysis5070/11 · Oct/Nov 2022 · Q181 Mark
Concentrated aqueous sodium chloride is electrolysed using inert electrodes. Which equation shows the reaction that occurs at the anode?
A2Cl⁻ → Cl2 + 2e⁻
B2Cl⁻ + 2e⁻ → Cl2
C2H⁺ + 2e⁻ → H2
D4OH⁻ → O2 + 2H2O + 4e⁻
✓ Correct answer
A: 2Cl⁻ → Cl2 + 2e⁻
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