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Why does the colour of copper sulphate s...

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

Text Solution

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Following chemical reaction occurs in this case.
`underset("Iron")(Fe(s)) + underset("sulphate")underset("Copper")(CuSO_4(aq)) rarr underset("Iron")(FeSO_4(aq)) + underset("Copper")underset("sulphate")(Cu(s))`
In this reaction a more active element iron displaces or removes another element copper from its compound-copper sulphate. Therefore colour of copper sulphate solution changes.
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