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

• A. $N{a}_{2}C{O}_3.N{a}_{2}O$
• B. $N{a}_{2}C{O}_3,NaOH$
• C. $NaHC{O}_3,N{a}_{2}C{O}_3$
• D. $N{a}_{2}C{O}_3,NaHC{O}_3$

Answer 1

The correct option is C $NaHC{O}_3,N{a}_{2}C{O}_3$

$\underset{\left(X\right)}{2NaHC{O}_3}\stackrel{Heat}{\to }\underset{\left(Y\right)}{N{a}_{2}C{O}_3}+H_{2}O+C{O}_2$
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.
$\underset{\left(Y\right)}{N{a}_{2}C{O}_3}+H_{2}O+C{O}_2\to \underset{\left(X\right)}{2NaHC{O}_3}$
Sodium carbonate reacts with carbon dioxide and water to produce sodium bicarbonate.