CH-1779
Electrolysis of solutions
Chemistry · Secondary 4 · Medium · Electrolysis of solutions
A student electrolyses aqueous copper(II) sulfate using copper electrodes at constant current. The mass of the cathode is measured every 5 minutes.
Which statement about the mass of the cathode is correct?
Which statement about the mass of the cathode is correct?
- It decreases at a constant rate with time.
- It increases at a constant rate with time.
- It first increases then stays constant after some time.
- It remains constant throughout the electrolysis.
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