NCERT Activity 3.12 Class 10 Science Explanation

In this activity, we will study the chemical reaction between metal and salt solution and identify the type of chemical reaction.

Displacement reaction between Metal and Salt Solution of other metal

Aim

 To observe the chemical reaction between metal and salt solution

Materials Required

    1. Copper wire

    2. Iron nails

    3. Test tubes

    4. Iron sulphate solution

    5. Copper sulphate solution

Procedure

We take two clean test tubes and fill iron sulphate solution in one test tube and copper sulphate solution in another.

Now we dip copper wire in the iron sulphate solution and iron nail in copper sulphate solution.

We leave the setups for 20 -30 minutes and after that we observe colour change and deposited formed.

Observation

Test tube	Set up	After 20 min.	Reaction occurred
1	Copper wire in iron sulphate	No change	No
2	Iron nail in copper sulphate	(i)Reddish brown on iron nail (ii) solution turns light green	Yes

 

Explanation

Iron is more reactive than copper so it displaces copper metal from copper sulphate solution. A reddish-brown deposit of copper metal is formed on iron nail and the solution becomes light green

This is a displacement reaction.

Fe + CuSO₄ →FeSO₄   + Cu

 

But copper cannot displace iron from iron sulphate solution because copper is less reactive than iron.

Conclusion

This activity demonstrates the displacement reaction and explains that iron is more reactive than copper.

Frequently Asked Questions

   1. Why does iron displace copper from copper sulphate solution?

Answer – Iron is more reactive than copper so it displaces copper from copper sulphate solution.

   2. What type of chemical reaction takes place in this activity?

Answer – Displacement reaction

   3. How is the activity 3.12 related to activities 3.9,3.10 and 3.11?

Answer – All these activities explain comparison of metal reactivity?

    4. Write the chemical reaction used in this activity?

Answer- Fe + CuSO₄ →FeSO₄   + Cu