Question

when you place an iron nail in copper sulphate solution the reddish brown coating formed on the nail . . . . . . . .

Answer 1

Answer:

Fe+CuSo4--->FeSo4+Cu

Explanation:

iron nail will react with sulphate and copper will remain,so on iron nail reddish brown coating will take place.

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Answer 2

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Iron nails are immersed in copper sulphate solution , the nails got coated with a metal.

When Iron nails are sunk in the copper sulphate solution, the iron reacts with the sulphate ion and displaces copper, then forms Iron sulphate.

This is an example of Chemical displacement reaction.

"The reaction in which a high reactive metal displaces less reactive metal (when compared with it) in its aqueous solution is called Chemical displacement reaction".

After this reaction, a brown layer of copper is formed on the nail.

Required chemical equation :

$\sf \large{ {CuSO _{4}} _{(aq)} + Fe _{(s)} \longrightarrow \: {FeSO _{4} }_{(aq)} + Cu_{(s)}}$

Hence, the layer of the metal formed on the nail is Copper.