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State the chemical property in each case...

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.

Text Solution

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(i) It is weakly alkaline in nature and neutralizes acid (HCl) formed in the stomach.
`NaHCO_(3)+HCltoNaCl+H_(2)O+CO_(2)`
It evolves `CO_(2)` in the form of bubbles when cake is made by baking. As a result, the cake becomes porous as well as fluffy.
`2NaHCO_(3)overset("heat")toNa_(2)CO_(3)+H_(2)O+CO_(2).`
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