Question

Give one method for industrial preparation and one for laboratory preparation of CO₂.

Answer 1

Caron dioxide

In the laboratory, CO₂ can be prepared by the action of dilute hydrochloric acid on calcium carbonate. The reaction involved is as follows:

\[\ce{CaCO_3 + 2HCl_{(aq)} -> CaCl_{2(aq)} + CO_{2(g)} + H_2O_{(l)}}\]

CO₂ is commercially prepared by heating limestone. The reaction involved is as follows:

\[\ce{CaCo3 ->[\Delta] CaO + CO2\uparrow}\]