Question

Question:

why does she color of copper sulphate solution changes when an iron nail is dipped in it?​

Answer 1

Answer:

Answer: When an iron nail immersed in the solution of copper sulphate than iron displaces copper from the solution of copper sulphate because iron is more reactive than copper. Therefore copper sulphate solution colour changes from blue to pale green.

Explanation:

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Answer 2

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Iron is more reactive than copper. When an iron nail is dipped in copper sulphate solution which is blue in color, iron being more reactive than that displaces copper from its solution and forms iron (II) sulphate which is green in color.