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1. Set up an electrolysis cell using graphite rods as electrodes and copperII sulphate solution as electrolyte. 2. At the anode Bubbles of gas oxygen are formed at the anode. Anode reaction 4OH-aq O 2 g 2H 2 Ol 4e-3. At the cathode A deposit of copper forms on the cathode this will often be powdery and uneven.