Chemistry 0620 · IGCSE · Electrolysis

Electrolysis — practice question

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.

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