Question

why do the colour & solution of copper sulphate change when we take a solution of copper sulphate in a beaker and put an iron nail in it ​

Answer 1

Answer:

(a) Chemical reaction of iron nail with copper sulphate solution in water. Iron displaces copper ions from an aqueous solution of copper sulphate. ... Thus iron is more reactive than copper. In this reaction, metallic iron is converted into ferrous ion (Fe2+) and cupric ion (Cu2 +) is converted into metallic copper.

Answer 2

The Fe displaces the Cu from CuSO4 solution in beaker A as Fe is more reactive than Cu. 

Therefore the blue colour of the solution changes to green due to the formation of FeSO4.

In beaker B, no reaction takes place as Cu being less reactive cannot displace Fe from FeSO4 solution.

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