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Question
Write scientific reason.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
Solution
- Zinc is more reactive than copper.
- Therefore, zinc displaces copper from copper sulphate solution.
\[\ce{\underset{\text{sulphate}}{\underset{\text{Copper}}{CuSO_{4(aq)}}} + \underset{\text{Zinc}}{Zn_{(s)}} -> \underset{\text{sulphate}}{\underset{\text{Zinc}}{ZnSO_{4(aq)}}} + \underset{\text{Copper}}{Cu_{(s)}}}\] - The blue colour of copper sulphate solution fades due to the formation of colourless zinc sulphate.
Hence, adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
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