During the electrolytic refining of impure copper, where is the pure copper deposited and what material serves as the cathode?

💡 Solution & Explanation

In electrolytic refining of copper, impure copper block is made the anode and a thin sheet of pure copper acts as the cathode immersed in acidified copper sulfate solution. During electrolysis, copper ions from the electrolyte migrate to the cathode and gain electrons to deposit as pure copper metal. Impurities like gold and silver settle down as anode mud beneath the anode.