Essential Chemistry for IGCSE - Electricity And Chemistry (Section 1 - No. 33)
Which of the following is the first step in the extraction of aluminum from bauxite ore?
Electrolysis of molten aluminum oxide.
Purifying the ore by reacting with sodium hydroxide.
Heating the ore with carbon.
Dissolving the aluminum oxide in cryolite.
Explanation
The ore is crushed and mixed with sodium hydroxide to dissolve the aluminum oxide.
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