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Chemistry · Oct / Nov 2023 · Paper 11 · Question 12

5070Electrolysis

Aqueous copper(II) sulfate is electrolysed with copper electrodes. What is the equation for the reaction occurring at the anode?

  1. ACu → Cu²⁺ + 2e⁻
  2. BCu²⁺ + 2e⁻ → Cu
  3. C4OH⁻ → O₂ + 2H₂O + 4e⁻
  4. D2SO₄²⁻ + 2H₂O → 2H₂SO₄ + O₂ + 4e⁻

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Correct answer: A. Cu → Cu²⁺ + 2e⁻

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