Question

Question 22

A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
(a) What changes do you expect?
(b) Are these changes chemical in nature?
(c) Write a word equation for the chemical change, if any.

Answer 1

(a) (i) Colour of the solution in the beaker changes from blue to green.
(ii) A brown coloured deposit is found on the surface of the iron nail.

(b) The changes are chemical in nature as new substances iron sulphate (green) and copper (brown) are formed.

(c) $\underset{blue}{Coppersulphate}+Iron\to \underset{green}{IronSulphate+}\underset{brown}{Copper}$