Question

What happens when
(a) Dilute sulphuric acid is poured on a copper plate?
(b) Iron nails are placed in copper sulphate solution?
Write word equations of the reactions involved.

Answer 1

b) when iron nails are placed in copper sulphate solution iron displaces copper from copper sulphate solution thus forming iron sulphate
Fe + Cuso4 -------- Fedor + Cu
therefore the blue colour of copper sulphate fades and green colour of iron sulphate appears

Answer 2

(a) No reaction will take place because copper is very less reactive.

(b) Iron being more reactive than copper will replace copper from its solution and brown coating of copper is deposited on the iron nails. Also, the blue colour turns green.

Iron + Copper sulphate (solution) → Iron sulphate (solution) + Copper