Essential Chemistry for IGCSE - Electricity And Chemistry (Section 3 - No. 43)
Which of the following is an advantage of using copper electrodes in the electrolysis of copper sulfate solution?
The process is faster.
The purity of the copper increases.
The concentration of the copper sulfate solution remains constant.
Oxygen is not produced at the anode.
Explanation
With copper electrodes, the copper from the anode replaces the copper ions deposited at the cathode, keeping the concentration constant.
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