Question

Discuss the other methods of preparation of carbon dioxide.

Answer 1

Other methods of preparation of carbon dioxide

Heating of metal carbonates and bicarbonates

• By heating metal carbonates and bicarbonates we can obtains carbon dioxide.

$$\begin{gathered} {\mathrm{MgCO}}_3\left(\mathrm{s}\right)\stackrel{∆}{\to }\mathrm{MgO}\left(\mathrm{s}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{Magnesium}\mathrm{carbonate}\mathrm{Magnesium}\mathrm{oxide}\mathrm{Carbon}\mathrm{dioxide} \\ 2{\mathrm{NaHCO}}_3\left(\mathrm{s}\right)\stackrel{∆}{\to }{\mathrm{Na}}_2{\mathrm{CO}}_3\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{Sodium}\mathrm{bicarbonate}\mathrm{Sodium}\mathrm{carbonate}\mathrm{Water}\mathrm{Carbon}\mathrm{dioxide} \end{gathered}$$

Action of dilute acids on metallic carbonates and bicarbonates

• Carbon dioxide can also be prepared by the action of dilute acids on metallic carbonates and bicarbonates.

$$\begin{gathered} {\mathrm{CuCO}}_3\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)\to {\mathrm{CuSO}}_4\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{Copper}\mathrm{Sulphuric}\mathrm{acid}\mathrm{Copper}\mathrm{Water}\mathrm{Carbon}\mathrm{dioxide} \\ \mathrm{carbonate}\mathrm{sulphate} \\ {\mathrm{NaHCO}}_3\left(\mathrm{s}\right)+\mathrm{HCl}\left(\mathrm{aq}\right)\to \mathrm{NaCl}\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{Sodium}\mathrm{Hydrochloric}\mathrm{acid}\mathrm{Sodium}\mathrm{Water}\mathrm{Carbon}\mathrm{dioxide} \\ \mathrm{bicarbonate}\mathrm{chloride} \end{gathered}$$

Burning of fuels

• Carbon dioxide is produces by burning fuels such as methane, petrol and diesel.

$$\begin{gathered} {\mathrm{CH}}_4\left(\mathrm{g}\right)+2{\mathrm{O}}_2\left(\mathrm{g}\right)\stackrel{\mathrm{burning}}{\to }{\mathrm{CO}}_2\left(\mathrm{g}\right)+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+\mathrm{heat} \\ \mathrm{Methane}\mathrm{Oxygen}\mathrm{Carbon}\mathrm{dioxide}\mathrm{Water} \\ \mathrm{C}\left(\mathrm{s}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)\stackrel{\mathrm{burning}}{\to }{\mathrm{CO}}_2\left(\mathrm{g}\right)+\mathrm{heat} \\ \mathrm{Carbon}\mathrm{Oxygen}\mathrm{Carbon}\mathrm{dioxide} \end{gathered}$$