Chemistry · May / June 2018 · Paper 11 · Question 7
5070Electrolysis
In the electrolysis of CuSO4(aq), what is the ionic equation for the reaction at the cathode?
- ACu + 2e– → Cu2+
- BCu2+ + 2e– → Cu
- C2H2O + Cu2+ + 2e– → Cu(OH)2 + O2
- DSO4 2– + 4H+ + 2e– → H2SO4 + H2
As printed in the paper
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Correct answer: B. Cu2+ + 2e– → Cu
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