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Preparations and Uses of Sodium Carbonate

CO_2 gas alon...

Question

$C O_{2}$ gas along with solid (Y) is obtained when sodium salt (X) is heated. (X) is again obtained when $C O_{2}$ gas is passed into aqueous solution of (Y). Identify (X) & (Y) respectively

N a_{2} C O_{3} . N a_{2} O

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N a_{2} C O_{3}, N a O H

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N a H C O_{3}, N a_{2} C O_{3}

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N a_{2} C O_{3}, N a H C O_{3}

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Solution

The correct option is C $N a H C O_{3}, N a_{2} C O_{3}$
$2 N a H C O_{3} (X) H e a t \to N a_{2} C O_{3} (Y) + H_{2} O + C O_{2}$
Because of this reaction, it is often used in cooking under the name baking soda as it releases $C O_{2}$ and produces foam as in cakes.
$N a_{2} C O_{3} (Y) + H_{2} O + C O_{2} \to 2 N a H C O_{3} (X)$
Sodium carbonate reacts with carbon dioxide and water to produce sodium bicarbonate.

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