Using Electrolysis to Extract Metals (AQA GCSE Chemistry): Flashcards

Too reactive to be reduced by carbon

Aluminium

Bauxite

$Al_2O_3$

Lowers the melting point of the bauxite mixture

Graphite

$Al^{3+}$ ions gain electrons (reduction)

$Al^{3+} + 3e^- \rightarrow Al(l)$

$O^{2-}$ ions lose electrons (oxidation)

$2O^{2-} \rightarrow O_2(g) + 4e^-$

Denser than the surrounding mixture

Oxygen gas and carbon dioxide