Question

9.
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

Answer:

a) When dilute sulphuric acid poured on a copper plate, the metal does not react with sulphuric acid.

b)Iron nails lose their shiny appearance because an insoluble layer of copper is formed on the nails.

Explanation:

thanks

Answer 2

Hello Friend,

I hope You understand this

Answer:

(i) No reaction occurs when dilute sulphuric acid is poured on a copper plate. However, when concentrated sulphuric acid is poured on a copper plate, hydrogen gas evolves along with the formation of blue coloured copper sulphate crystals. The chemical reaction for the reaction between concentrated sulfuric acid and copper is:

 $Cu + H_{2}SO_{4} (conc.)$  → $CuSO_{4} + H_{2}$

ii) Iron being more reactive displaces copper from copper sulphate. In this reaction, the blue colour of copper sulphate fades and there is a deposition of copper on the iron nail.

$Fe + CuSO_{4}$ →  $FeSO_{4} + Cu$