Question

The gas evolved when diluted hydrochloric acid is added to metal carbonate?

Answer 1

• When diluted hydrochloric acid (HCl) is added to metal carbonate, carbon dioxide gas is released.
• We can test this by bringing a burning matchstick to the area where the gas is evolved, and it will be observed that the matchstick will stop burning. With this, it will be proved that carbon dioxide (${\mathrm{CO}}_2$) gas is released.
• Reaction involved:
• $$\begin{gathered} {\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{aq}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{sodium}\mathrm{carbonate}\mathrm{sulphuric}\mathrm{acid}\mathrm{sodium}\mathrm{sulpfate}\mathrm{water}\mathrm{carbon}\mathrm{dioxide} \end{gathered}$$