Essential Chemistry for IGCSE - Electricity And Chemistry (Section 2 - No. 31)
In the electrolysis of copper sulfate solution with copper electrodes, which statement is correct?
The mass of the anode increases.
The mass of the cathode decreases.
The concentration of copper(II) ions in the solution remains constant.
The concentration of copper(II) ions in the solution decreases.
Explanation
With copper electrodes, the anode dissolves and copper is deposited at the cathode, so the concentration of copper(II) ions stays about the same.
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