Essential Chemistry for IGCSE - Electricity And Chemistry (Section 3 - No. 10)
In the electrolysis of alumina, what happens at the anode?
Aluminum ions are reduced to aluminum metal.
Oxide ions are oxidized to oxygen gas.
Aluminum atoms gain electrons.
Cryolite is converted into metallic aluminum.
Explanation
At the anode, oxide ions lose electrons and are oxidized to form oxygen gas.
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