Question
Aluminium is extracted by electrolysis of molten aluminium oxide dissolved in cryolite.
(a) Explain why aluminium oxide is mixed with cryolite. [2 marks]
(b) Write the half-equations at the cathode and anode. [2 marks]
(c) Explain why the carbon anodes must be replaced regularly. [2 marks]
6 marks · take your time before peeking.
Sign up to try the next 30 problems
Save your streak, mark answers against the spec, and build a daily revision habit. Free during public beta — no card, no auto-renew.
Generated by TopMyGrade AI · cross-check official sources before relying on the mark-scheme phrasing.