Explain why aluminium is obtained by electrolysis rather than by reduction with carbon.
The electrolyte is a blend of aluminium oxide and cryolite. Explain the purpose of the cryolite.
At the positive electrode (anode), oxide ions are changed into oxygen. Construct the equation for this reaction.
Aluminium can also be made on a small scale by reacting aluminium oxide with magnesium. $\text{Al}_2\text{O}_3 + 3\text{Mg} \rightarrow 2\text{Al} + 3\text{MgO}$ Use this equation to explain why the Al$_2$O$_3$ is reduced.
Calculate the greatest mass of aluminium formed when 25.5 g of aluminium oxide reacts with excess magnesium.
Aluminium is a metal. Use your knowledge of metallic structure to explain why aluminium is malleable.
When aluminium is heated in chlorine, aluminium chloride is produced. The reaction is exothermic. Explain, in terms of bond making and bond breaking, why this reaction is exothermic.