(a)[1]
Why is aluminium not obtained by heating aluminium oxide with carbon?
(b(i))[2]
Complete the dot-and-cross diagram to show the electron arrangement in one oxide ion found in aluminium oxide. Add the charge on the oxide ion.
(b(ii))[2]
Explain why the melting point of aluminium oxide is high.
(c(i))[2]
Name the type of particle that carries charge in the wires, and in the electrolyte.
(c(ii))[2]
Give two reasons for using cryolite.
(c(iii))[1]
Write the ionic half-equation for aluminium being formed during the electrolysis.
(c(iv))[3]
Explain how carbon dioxide gas is produced at the anodes.
(d)[1]
Explain why aluminium fails to react immediately with dilute hydrochloric acid.