Class 10 NCERT Science Activity 2.5 Explanation

 In this post, you will find Class 10 NCERT Science Activity 2.5 Explanation in detail. This activity is based on chapter 2 Acids, Bases, and Salts of class 10 science.

Class 10 NCERT Science Activity 2.5 Explanation
 

 

Activity- Take two test tubes, and label them as A and B.

·      Take about 0.5 g of sodium carbonate (Na₂CO₃) in test A and about 0.5 g of sodium hydrogen carbonate (NaHCO₃) in test tube B.

·      Add about 2 ml of dilute HCI to both the test tubes.

·      What do you observe?

·      Pass the gas produced in each case through lime water (calcium hydroxide solution) as shown in fig... and record your observations.

Observation- A brisk effervescence is seen in the reaction mixture in both test tubes.

Test Tube A-

Na₂CO₃ + 2HCl →2NaCl + H₂O +CO₂

Test Tube B-

NaHCO₃ + HCl → NaCl + H₂O +CO₂

When the gas produced in each test tube is passed through lime water with the help of a delivery tube. Lime water turns milky.

 

Ca(OH)₂(aq) + CO₂(g) → CaCO₃(s) + H₂O(I)

Lime water                        milky

When the gas is passed in excess, calcium hydrogen carbonate is formed and turns milkiness.

CaCO₃(s) + CO₂(g) → H₂O(I) → Ca(HCO₃)₂(aq)

Conclusion: All acids decompose metal carbonates and metal hydrogen carbonates with the liberation of CO₂ gas, water, and corresponding salt. 

Watch the Video to understand the topic

Related Topics -

1.  Activity 2.6

2. Activity 2.4

2. Solutions of Chapter 2 

3. MCQ Questions of Chapter 2

4. Extra Questions of Chapter 2