1.53     describe experiments to investigate electrolysis, using inert electrodes, of molten salts such as lead(II) bromide and predict the products

Set up a simple circuit with a battery and two electrodes made of graphite. Melt the solid in a crucible and insert the electrodes. A new substance will be formed at each electrode. The metal forms at the negative electrode and the non-metal forms at the positive electrode.

With lead (II) bromide, silvery coloured lead will form around the negative electrode and sink to the bottom of the crucible, and brown bromine vapour will be seen around the positive electrode.

(Note in circuit diagrams, the longest bar in the cell / battery symbol indicates the positive terminal.)