Question

Complete and balance the following equation :

${\mathrm{CaCO}}_3\to \mathrm{\_\_\_\_\_\_}+\mathrm{\_\_\_\_\_\_\_}$

• A. CaO
• B. CO₂

Answer 1

• When Calcium carbonate is heated it decomposes into calcium oxide(quick lime) and carbon dioxide gas.

The balanced equation of the reaction is-

$\underset{\mathrm{Calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}\stackrel{∆}{\to }\underset{\mathrm{Calcium}\mathrm{oxide}}{\mathbf{CaO}\mathbf{\left(}\mathbf{s}\mathbf{\right)}}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathbf{CO}}_{\mathbf{2}}\mathbf{\left(}\mathbf{g}\right)}$