Question

One student was assigned the experiment of interaction of iron nail with a solution of copper sulphate.
i. What observation he/she would have recorded with respect to:
a. Initial colour of the solution?
b. Final colour of the solution?
ii. What is the reason for change in the colour of the solution?

Answer 1

i. a. Initial colour of the copper sulphate solution was blue.

b. After completion of reaction,colour  of the solution changes to light green.
ii. In this reaction,colour of solution changes from blue to light green due to the formation of ferrous sulphate.