Chemistry
(a) Draw a labeled diagram to show how iron is electroplated with copper.
(b) Which solution is preferred as electrolyte, CuSO4 or FeSO4?
(c) Describe what happens to the iron object and the copper rod.
Electrolysis
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Answer
(a) Labeled diagram showing electroplating of Iron with Copper is shown below:
(ii) CuSO4 is preferred as electrolyte must be a solution of a salt of metal to be electroplated.
(iii) The copper anode continuously dissolves as ions in solution and is replaced periodically. The electrolyte dissociates into Cu2+ ions which migrate towards the iron object taken as the cathode. Here, the Cu2+ ions gain electrons and become atoms of copper which deposit on the iron object as a firm coating. Thus, the iron object gets electroplated with copper.
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