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Question

State the chemical property in each case on which the following uses of baking soda are based:
(i) as an antacid.
(ii) as a constituent of baking powder. [3 MARKS]


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Solution

Each point: 1.5 Mark

1. It is weakly alkaline in nature and neutralizes acid (HCl) formed in the stomach. The reaction involved is

NaHCO3+HClNaCl+H2O+CO2

2. It evolves CO2 in the form of bubbles when cake is made by baking. As a result, the cake becomes porous as well as fluffy. The reaction involved is

NaHCO3Na2CO3+H2O+CO2


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