Essential Chemistry for IGCSE - Electricity And Chemistry (Section 4 - No. 8)
During the electrolysis of copper(II) sulfate solution using copper electrodes, what happens at the cathode?
The copper electrode dissolves.
Copper ions are oxidized to form copper.
Copper is deposited onto the cathode.
Oxygen gas is produced.
Explanation
Copper ions gain electrons (reduction) and are deposited on the cathode as copper atoms.
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