Question

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 **** *** 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.