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.

      

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.
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i) During the electrolysis hydrogen gas was formed at electrode Y. Identify the anode. Give a reason for your answer.
ii) Why is the concentration of magnesium sulphate expected to increase during electrolysis?
iii) What will be observed if red and blue litmus papers were dipped into the solution after electrolysis?

  

Answers


John
i) The anode is electrode X.

Since hydrogen forms at the cathode which is electrode Y, then X is the anode.

ii) Because during electrolysis the elements of water are removed in the ratio in which they appear in water.

iii) red litmus paper remains red while blue litmus paper remains blue
johnmulu answered the question on May 15, 2017 at 09:01


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