Electrolysis to extract metals (Edexcel GCSE Chemistry Combined Science): Quizzes

Aluminium is too reactive

Bauxite

$Al_2O_3$

To lower the melting point

Graphite electrodes

$Al^{3+}$ ions

$O^{2-}$ ions

They gain electrons and are reduced

They lose electrons and are oxidised

It is denser than the mixture

Carbon dioxide

$Al^{3+} + 3e^- \rightarrow Al$