Question

Draw a labelled diagram to show electrolytic refining of copper. State what happens when electric current is passed through the electrolyte taken in this case.

Answer 1

• Anode (Impure Copper): Impurities from the anode dissolve into the electrolyte or settle as anode mud.
• Cathode (Pure Copper): Copper ions from the electrolyte are reduced and deposit as pure copper on the cathode.
• Electrolyte: Acidified copper sulfate (\(CuSO_4\)) solution.