Iron filings were added to a solution of copper sulphate. After 10 minutes, it was observed that the blue colour of the solution changes and a layer gets deposited or iron filings. What is the colour of the solution and the layer deposited?

Question

Philoid · Accepted Answer

• Iron is more reactive than copper.

• So, when iron fillings are added to copper sulphate solution, iron displaces copper from copper sulphate and takes the place of copper forming ferrous sulphate.

• Hence, the displacement reaction takes place.

• The formation of ferrous sulphate leads to the change in colour.

• The blue colour of solution changes to pale green colour.

• The layer becomes brown in colour.