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(a) The set up below was used to investigate the products formed at the electrodes during electrolysis of aqueous magnesium sulphate
using inert electrodes. Use it to answer the questions that follow.
(i) During the electrolysis, hydrogen gas was formed at electrode Y. Identify the anode. Give a reason for your answer.
(ii) Write the equation for the reaction which took place at electrode X.
(iii) Why is the concentration of magnesium sulphate expected to increase during electrolysis?
(iv) What will be observed if red and blue litmus papers were dipped into the solution after electrolysis.
(b) During electrolysis of magnesium sulphate, a current of 0.3A was passed for 30 m