CH-1700

Electrolysis of solutions

Chemistry · Secondary 4 · Hard · Electrolysis of solutions

Aqueous copper(II) sulfate is electrolysed using copper electrodes. Which statement about the concentration of

\text{Cu}^{2+}

ions in the solution after electrolysis is correct?

It increases because copper dissolves at the anode only.
It decreases because copper is deposited at the cathode only.
It remains the same because loss and gain of $\text{Cu}^{2+}$ are balanced.
It first increases then decreases as electrolysis continues.

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