O-LevelChemistryElectrolysis5070/11 · May/June 2015 · Q131 Mark

What are the correct anode (positive electrode) and cathode (negative electrode) products when aqueous copper(II) sulfate is electrolysed using copper electrodes?

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ARow A: anode product aqueous copper(II) ions, cathode product copper metal

BRow B: anode product aqueous copper(II) ions, cathode product hydrogen gas

CRow C: anode product oxygen gas, cathode product copper metal

DRow D: anode product oxygen gas, cathode product hydrogen gas

✓ Correct answer

A: Row A: anode product aqueous copper(II) ions, cathode product copper metal

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2015 Paper 1 Variant 1, question 13.

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