Activity 1.3 Class 10 Science -

Table of Contents

Aim of the activity

To find the chemical changes when zinc reacts with an acid like hydrochloric or sulphuric acid.

Materials used in the activity

Conical flask
Zinc granules
Hydrochloric acid/Sulphuric acid

Procedure

We will take a conical flask and add some zinc granules in it. After that we will add some amount of hydrochloric acid or sulphuric acid to the flask and observe it.

Observation

When zinc reacts with acid, we can see bubbles accompanied with brisk effervescence.

When we touch the flask, it gets hot.

Explanation

We know when a metal reacts with an acid, a salt and hydrogen gas are produced. This reaction is displacement reaction.

Zinc displaces hydrogen from acid and form a salt.

During this reaction, heat is also produces, so the reaction is also exothermic reaction

Chemical reaction involves in the activity

Zn(s) + H₂SO₄ (aq) → ZnSO₄ (aq) + H2(g) ↑

(Zinc) (Sulphuric acid) (Zinc sulphate) (Hydrogen)

Conclusion

The activity shows the chemical reaction between a metal and acid. The reaction is exothermic reaction and displacement reaction.

Precautions

Students must perform this activity under the guidance of the teacher.

Activity 1.3 Class 10 Science