iron nail was dipped into a salt solution . after sometime a reddish- brown deposition was seen .what could be the salt solution

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Solution

The salt solution should be copper sulphate (CuSO₄). Iron displaces copper from its salt solution as a result of which a reddish-brown layer of Cu is deposited on iron nail. The reaction is as follows:
$F e (s) + C u S O_{4} (a q) \to F e S O_{4} (a q) + C u (s)$

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iron nail was dipped into a salt solution . after sometime a reddish- brown deposition was seen .what could be the salt solution

The salt solution should be copper sulphate (CuSO4). Iron displaces copper from its salt solution as a result of which a reddish-brown layer of Cu is deposited on iron nail. The reaction is as follows: Fe(s) + CuSO4(aq) →FeSO4(aq) +Cu(s)

The salt solution should be copper sulphate (CuSO₄). Iron displaces copper from its salt solution as a result of which a reddish-brown layer of Cu is deposited on iron nail. The reaction is as follows:
$F e (s) + C u S O_{4} (a q) \to F e S O_{4} (a q) + C u (s)$