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    Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

    Asked By James White


    • Copper sulphate solution is blue in colour when an iron nail is dipped in it, its blue colour changes.This happens due to the following displacement reaction. Iron being more reactive than Cu, displaces it thereby forming a new product iron sulphate and copper metal.Fe(s) CuSO4(aq) FeSO4 (aq) Cu (s)

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