NIOS Class 10 Science and Technology Activity 8.2 Acids, Bases and Salts

This activity explains the reaction between acids and metals.

NIOS Class 10 Science and Technology Project File

This activity is based on the NIOS class 10 science and technology chapter 8- Acids, Bases, and Salts.

Aim of the activity

 To study the chemical reaction between zinc and dilute sulphruic acid

Materials Required

1. Zinc granules

2. Dilute sulphuric acid

3. Test tube

4. Delivery tube

5. Dropper

6. Matchbox

7.  Safety goggles and gloves

Procedure

 We take a clean test tube and add a few zinc granules to it, and fix it on a stand. Now we add a few drops of dilute sulphuric acid.

 After some time, we notice bubbles forming around zinc granules. We bring a burning matchbox near the mouth of the test tube and observe.

Observation

1.  Bubbles are formed around zinc granules.

2.  A ‘pop ’ sound is heard when a burning matchstick is brought near the test tube.

Explanation

Zinc reacts with dilute sulphuric acid to produce salt (

zinc sulphate) and hydrogen gas. The reaction is

a displacement reaction. In this reaction, metal zinc

displaces hydrogen from the acid.

Zn  + H₂SO₄  →ZnSO₄   +H₂ ↑  

Conclusion

We can conclude from this activity that metals react

With an acid, produce hydrogen gas and salt. This is a

displacement reaction.

Frequently Asked Questions

1. Can this activity be performed with other metals?

Answer – Yes, metals like iron, magnesium are also used in the activity.

2. Why is the ‘pop’ sound heard in the activity?

Answer – Hydrogen gas is a highly flammable gas. When a matchstick is near the test tube, hydrogen burns with a popping sound.

3. What is the name and formula of the salt formed in this activity?

Answer – Zinc sulphate (ZnSO₄)