(a)[2]
Magnesium is produced by electrolysing molten magnesium chloride. Write equations for the two electrode reactions that take place in this electrolysis.
(b(i))[1]
Copper may be purified by electrolysis of aqueous copper(II) sulfate. What material is used for the anode (positive electrode)?
(b(ii))[1]
What material is used for the cathode (negative electrode)?
(c)[3]
Chlorine is produced by electrolysing concentrated aqueous sodium chloride. The overall reaction can be written as $2\text{NaCl}(aq) + 2\text{H}_2\text{O}(l) \rightarrow 2\text{NaOH}(aq) + \text{Cl}_2(g) + \text{H}_2(g)$. $55\,\text{dm}^3$ of $3.5\,\text{mol dm}^{-3}$ aqueous sodium chloride is electrolysed. What maximum volume of chlorine can be produced, measured at room temperature and pressure?