Question

Iron is more reactive than copper. Can you write an activity to show this?

Answer 1

To prove that iron is more reactive than copper:​

Steps:​

• Take a solution of copper sulphate (blue). ​

• Add some iron nails to it. ​

• Leave it for about an hour.​

Observations:​

• A brown coating is formed on the surface of iron ​

• The color of copper sulphate solution has turned from blue to light green.​

Conclusion:​

• Due to high reactivity of iron, it displaces copper and forms iron sulfate solution (light green).
  $\text{(Iron)Fe+(Copper sulphate)}CuS{O}_4$
  $\to \text{(Iron sulphate)}FeS{O}_4+\text{(Copper) Cu}$