Chemistry · May / June 2021 · Paper 11 · Question 13

An aqueous mixture of copper(II) nitrate and silver nitrate is electrolysed with pure copper electrodes. Which half-equation correctly describes the change occurring at the anode?

1. ACu → Cu2+ + 2e–
2. BCu2+ + 2e– → Cu
3. CAg → Ag+ + e–
4. DAg+ + e– → Ag

As printed in the paper