Write equations for the reactions taking place at the two electrodes (mentioning clearly the name of the electrode)

Write equations for the reactions taking place at the two electrodes (mentioning clearly the name of the electrode) during the electrolysis of:

1. Acidified copper sulphate solution with copper electrodes.
2. Molten lead bromide with inert electrodes.

Answer

1. At cathode Cu⁺²+2e → Cu   Reduction
   At anode Cu-2e → Cu⁺² oxidation
2. At cathode Pb⁺²+2e → Pb Reduction                                                                                                                                      At anode 2Br^-- 2e → Br₂

• Exam Year: 2016