Question

What will be the two observations made by the student when iron filings are added to copper sulphate solution?

Answer 1

Copper will come on iron fillings and turns greenish red

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Answer 2

1) Iron is more electropositive than copper. It can displace Copper (Cu) from its salt Copper sulphate (CuSO4) and thus its colour changes from blue to green.   Fe + CuSO4 →FeSO4 + Cu
2) A brown coating is formed over the iron filings.

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