Question

why does the colour of copper sulphate solution change when magnesium ribbon is dipped in it​

Answer 1

The colour of copper sulphate solution change when magnesium ribbon is dipped in it​ because magnesium being more reactive displaces copper from copper sulphate solution.

Explanation:

• According to the reactivity series table, magnesium is more reactive in nature as compared to zinc metal. So, when magnesium ribbon is added to copper sulphate solution then reaction is as follows.

• $CuSO_{4} + Mg \rightarrow MgSO_{4} + Cu^{2+}$

• Therefore, magnesium being more than copper displaced copper in $CuSO_{4}$ leading to the formation of $MgSO_{4}$ solution which is depicted by change in color of the solution.

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