CH-1728
Electrolysis of solutions
Chemistry · Secondary 4 · Medium · Electrolysis of solutions
A solution of copper(II) sulfate is electrolysed using copper electrodes. After some time, the mass of the anode decreases by 0.40 g. What happens at the cathode?
- Its mass increases by 0.40 g as copper is deposited.
- Its mass decreases by 0.40 g as copper dissolves.
- Its mass increases by 0.20 g as copper is deposited.
- Its mass does not change because only the electrolyte is used up.
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