Essential Chemistry for IGCSE - Electricity And Chemistry (Section 2 - No. 19)
In the process of purifying copper, what is the main role of the impure copper electrode?
To be the cathode where pure copper is deposited.
To be the anode where the copper dissolves and impurities fall to the bottom.
To be the electrolyte where the copper ions are formed.
To be the inert electrode that doesn't participate.
Explanation
The impure copper is the anode and dissolves, allowing for pure copper to deposit on the cathode.
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