Essential Chemistry for IGCSE - Electricity And Chemistry (Section 8 - No. 10)
The electrolysis of molten aluminum oxide uses carbon electrodes. What happens to the carbon anodes during electrolysis?
They dissolve in the electrolyte.
They are reduced to aluminum.
They react with oxygen to form carbon dioxide.
They remain unchanged.
Explanation
The anodes react with the oxygen produced in the electrolysis, forming carbon dioxide gas.
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