Question

the evolution of a gas. What type of change is it? Explain.
4. When baking soda is mixed with lemon juice, bubbles are formed
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Answer 1

Answer:

When baking soda is mixed with lemon juice bubbles are formed with the evolution carbon dioxide gas. This is a chemical change.

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Answer 2

When baking soda (Sodium hydrogen carbonate) is mixed with lemon juice (citric acid), bubbles are formed. The bubbles are formed due to the evolution of carbon dioxide gas. This is a chemical change.

In this change, citric acid contained in lemon juice reacts with sodium hydrogen carbonate which results in the evolution of carbon dioxide gas.

Lemon juice + Baking soda → Carbon dioxide + Other substances

Citric acid Sodium

Hydrogen carbonate