Pavani is a very mischievous girl, she added baking soda in lemon juice. As soon as baking soda was added in lemon juice some changes took place and she was stunned, what kind of changes happened?. Explain briefly. [3 MARKS]

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Solution

Explanation: 1.5 Marks
Word equation: 1.5 Marks

When Pavani adds baking soda with lemon juice a chemical change will occur, in this reaction new substance will be formed that is carbon dioxide along with the evolution of heat. Since, there is formation of a new substance in this reaction, it is a chemical change. This is also an irreversible reaction.
The equation for the reaction is as follows:

Sodium Bicarbonate + Citric acid $\to$ Sodium Citrate + Carbon dioxide + Water + Heat

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