Question

______________ soda on heating decomposes to sodium carbonate, water and carbon dioxide .

Answer 1

1. When Baking soda (Sodium bicarbonate(${\mathrm{NaHCO}}_3$)) is heated, it undergoes decomposition to form Sodium carbonate $\left({\mathrm{Na}}_2{\mathrm{CO}}_3\right)$, water $\left({\mathrm{H}}_2\mathrm{O}\right)$ and Carbon dioxide $\left({\mathrm{CO}}_2\right)$.
2. The reaction involved here is :

$\underset{(\mathrm{Sodium}\mathrm{bicarbonate})}{\underbrace{2{\mathrm{NaHCO}}_3\left(\mathrm{s}\right)}}\stackrel{∆}{\to }\underset{(\mathrm{Sodium}\mathrm{carbonate})}{\underbrace{{\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{s}\right)}}+\underset{(\mathrm{Carbon}\mathrm{dioxide})}{\underbrace{{\mathrm{CO}}_2\left(\mathrm{g}\right)}}+\underset{\left(\mathrm{Water}\right)}{\underbrace{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}}$

Therefore, Baking soda on heating decomposes to sodium carbonate, water and carbon dioxide.