Aluminium is a highly significant metal. It is obtained from bauxite ore by electrolysis. Bauxite is an impure form of aluminium oxide, Al$_2$O$_3$.
(a)[5]
Describe the method used to extract aluminium from bauxite. Include an ionic half-equation for the reaction taking place at each electrode.
(b)[2]
Explain why the anodes need to be replaced at regular intervals.
(c)[4]
Give two uses of aluminium and state why aluminium is suitable for each one.
Worked solution & mark scheme
This 11-mark question has a full step-by-step worked solution and mark scheme. One marking point: “bauxite / alumina dissolved within molten cryolite” …