State what the term electrolysis means.
State why graphite is a suitable material for an electrode.
Write an ionic half-equation for hydrogen formation at the cathode.
Name the kind of particle that transfers charge in conducting wires.
Name the kind of particle that transfers charge in aqueous potassium bromide.
State the names of the products that are formed when electricity is passed through dilute aqueous potassium bromide using graphite electrodes at the anode and at the cathode.
Name the aluminium compound found in purified bauxite.
State two reasons why cryolite is used in this electrolysis.
Explain why the carbon anode must be replaced regularly.
Write the symbol equation for the overall reaction in a hydrogen-oxygen fuel cell.
State one advantage of using hydrogen-oxygen fuel cells instead of petrol in vehicle engines.