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.

${N a H C O}_{3}$ + HCl → NaCl + $H_{2} O$ + ${C O}_{2}$

2. It evolves ${C O}_{2}$ in the form of bubbles when cake is made by baking. As a result, the cake becomes porous as well as fluffy.

${N a H C O}_{3}$ → ${N a}_{2} {C O}_{3}$ + $H_{2} O$ + ${C O}_{2}$

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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]

Each point: 1.5 Mark 1. It is weakly alkaline in nature and neutralizes acid (HCl) formed in the stomach. NaHCO3 + HCl → NaCl + 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. NaHCO3 → Na2CO3 +H2O + CO2

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]