Question

List two observations you would record in your notebook 30 minutes after adding iron filings to copper sulphate solution.

Answer 1

After adding iron filings to the copper sulphate solution, the two observations observed are:

1. The blue color of the copper sulphate changes to pale green as iron displaces copper from copper sulphate solution and forms a ferrous sulphate solution.

2. When left undisturbed, the green color changes to reddish-brown due to the deposition of copper.