1.52 understand that electrolysis involves the formation of new substances when ionic compounds conduct electricity

The products of electrolysing a molten binary compound (a compound only containing two elements) can easily be predicted by using the following rules:

• The metal is formed at the negative electrode (cathode)
• The non-metal is formed at the positive electrode (anode)

E.g. With molten lead (II) bromide, lead is formed at the negative electrode and bromine is formed at the positive electrode.