O-LevelChemistryElectrolysis5070/11 · May/June 2024 · Q131 Mark

The apparatus shown is set up to electroplate a steel key with copper. The key does not get coated with copper. Which change needs to be made to electroplate the key?

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Aincrease the concentration of the aqueous copper(II) sulfate

Bincrease the electric current

Creplace the solution with dilute sulfuric acid

Dreverse the electrical connections

✓ Correct answer

D: reverse the electrical connections

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Topic: Electrolysis, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2024 Paper 1 Variant 1, question 13.

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