This activity explains the chemical reaction between Zinc and Hydrochloric acid or sulphuric acid, the activity has been taken from the chapter 1 Chemical Reactions and Equations
Aim of the activity
To find the chemical changes when zinc reacts with an acid like hydrochloric or sulphuric acid.
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| Activity 1.3 Class 10 Science |
Materials used in the activity
1.Conical flask2.Zinc granules
3.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.
Frequently Asked Questions
1. What gas is evolved during the chemical reaction between zinc and HCl?
Answer - Hydrogen gas
2.Is this the chemical change or physical change?
Answer- This is a chemical change because new substances are formed in the reaction.
3.Is this exothermic or endothermic reaction?
Answer- This is an exothermic reaction.
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