Learning objective

Explain why aluminium oxide is dissolved in molten cryolite during extraction.

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Topic

Electrolysis

Subtopic

Using electrolysis to extract metals

AQA GCSE ChemistryChemical changes

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Understand this objective

Short explanation

Explain why aluminium oxide is dissolved in molten cryolite during extraction. This objective belongs to Using electrolysis to extract metals within Electrolysis for AQA GCSE Chemistry 8462. A strong answer should use aluminium oxide accurately, explain the chemistry behind the statement, and connect the idea back to the exact command in the objective. When revising, separate this point from neighbouring Chemistry ideas by naming the relevant particle, substance, process, calculation, observation, or structure before giving the final conclusion.

Key concepts

aluminium oxidemolten cryolite

Why it matters

This objective helps connect Using electrolysis to extract metals to exam-style questions, flashcards, and revision notes for Electrolysis.

Common mistakes

1 linked

Aluminium oxide dissolves in molten cryolite because it reacts chemically: Aluminium oxide dissolves in molten cryolite simply because cryolite is a molten salt that provides a low‑melting, electrically conductive medium; the Al₂O₃ remains chemically unchanged and is only dispersed in the melt, not reacted with the cryolite.

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