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Question
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Solution
- When baking soda (Sodium hydrogen carbonate) is mixed with lemon juice (citric acid), bubbles form. The bubbles are formed due to the evolution of carbon dioxide gas, which is a chemical change.
- In this change, the citric acid in lemon juice reacts with sodium hydrogen carbonate, resulting in the evolution of carbon dioxide gas.
\[\ce{\underset{(Sodium bicarbonate)}{Baking Soda} + Lemon juice -> \underset{(CO2)}{Carbon dioxide} + Other substances}\]
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