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The set-up below was used during the electrolysis of aqueous magnesium sulphate using inert electrodes.
(a) Name a suitable pair of electrodes for this experiment.
(b) Identify the anions and cations in the solution.
(c) On the diagram, label the cathode.
(d) Write ionic equations for the reactions that took place at the:
Anode:
Cathode:
(e) Explain the change that occurred to the concentration of magnesium sulphate
solution during the experiment.
(f) During the electrolysis, a current of 2 amperes was passed through the solution for 4 hours. Calculate the volume of the gas produced at the anode. ( 1 faraday=96500 coulombs and volume of a gas at room temperature is 24000# cm^3#)
(g) One of the uses of electrolysis is electroplating.
(I)What is meant by electroplating?
(II) Give two reasons why electroplating is necessary.