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Physical and Chemical Changes
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Neutralisation Reaction: It is the reaction of an acid and a base to give salt and water with the evolution of heat. Thus, a new substance is formed called salt.
Acid + Base →Salt + Water
Lemon contains citric acid while baking soda is a base. When lemon juice is added to baking soda, the acid reacts with the base to form along with the evolution of carbon dioxide gas.
Here, the chemical composition of both lemon juice and baking soda changes that leads to the formation of new substance. Hence, it is a chemical change.
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