Essential Chemistry for IGCSE - Electricity And Chemistry (Section 5 - No. 17)
What is the function of cryolite in the electrolytic cell used for aluminum extraction?
To act as a catalyst.
To lower the melting point of the aluminum oxide.
To provide the oxygen for the anode reaction.
To form the aluminum metal.
Explanation
Cryolite lowers the melting point of aluminum oxide, which helps to reduce energy costs.
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