Bauxite includes aluminium oxide. Aluminium is obtained from aluminium oxide by electrolysis. Why is cryolite added to the electrolytic cell used for aluminium extraction?
- ACryolite prevents the carbon anodes being burned away.
- BCryolite removes impurities from the bauxite.
- CCryolite increases the rate at which aluminium ions are discharged.
- DMolten cryolite dissolves the aluminium oxide.