Question

4. When baking soda is mixed with lemon juice, bubbles are formed with
the evolution of a gas. What type of change is it? Explain.​

Answer 1

Explanation:

When baking soda (Sodium bicarbonate) is mixed with lemon juice(citric acid), bubbles are formed.

These bubbles are formed due to the evolution of carbon dioxide gas.

This is a chemical change.

In the change, the citric acid contained in lemon juice reacts with the baking soda or sodium bicarbonate) which results in the evolution of carbon dioxide gas.

Lemon Juice + Baking soda → Carbon dioxide + Other substances

Answer 2

When baking soda is mixed with lemon juice, bubbles are formed with the evolution of gas. This gas is carbon dioxide CO2.

This is a chemical change.

In this chemical reaction the citric acid in the lemon juice reacts with the baking soda or sodium bicarbonate which results in the evolution of carbon dioxide gas and formation of bubbles.

Citric acid + Sodium bicarbonate ➪ Carbon dioxide + other substances.