Chemistry 0620 · IGCSE · Extraction of metals

Extraction of metals — practice question

Why is cryolite added when aluminium is extracted by electrolysis?

  • AIt is a catalyst for the reaction.
  • BIt lowers the melting point of the electrolyte.
  • CIt protects the anodes.
  • DIt separates the aluminium from the electrolyte.

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