Question

4. Why do the colour & solution of copper sulphate change when we take a solution of

copper sulphate in a beaker and put an iron nail in it?​

Answer 1

Answer:

Chemical reaction of iron nail with copper sulphate solution in water. Iron displaces copper ions from an aqueous solution of copper sulphate. It is a single displacement reaction of one metal by another metal. ... Thus iron is more reactive than copper.

Answer 2

Answer:

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Because of displacement reaction b/w copper and iron

ADDITIONAL INFORMATION

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In more detailed

When we add iron nail to the copper sulphate solution the following reaction will happen

Iron + copper sulphate ---- Iron sulphate + copper

Fe + Cuso4 ----- Fe so 4 + cu

Iron is more reactive than copper so it displaces copper from copper sulphate solution.

This is the type of displacement reaction

Colour of iron sulphate is green thatswhy colour of copper sulphate changes.

• More reactive element displaces the less reactive element.