Question

explain why the blue colour of copper sulphate solution changes to light green when an iron nail is dipped into it?

Answer 1

when copper sulphate is made to react with iron nails the iron nails displcess the copper atoms present in the copper sulphate molecule hence iron sulphate is formed the iron sulphate solution is green in colour hence the colour of copper sulphate solution changes to Green when iron nails are dipped in it

Answer 2

displacement reaction takes place.


iron displaces copper from the solution.


Fe+cuso4-------feso4+cu