Question

In the laboratory, carbon dioxide is prepared by the action of ________________ on ________________ in woulfe’s bottle.

• A. Calcium carbonate
• B. Hydrochloric acid

Answer 1

Woulfe’s bottle: A bottle with more than one neck, used for passing gases through liquids.

Preparation of carbon dioxide:

• When calcium carbonate is treated with hydrochloric acid, the evolution of carbon dioxide takes place.
• The gas may be collected by upward displacement of air since it is heavier than air.
• Chemical Reaction:
• $\underset{\mathrm{Calcium}\mathrm{carbonate}}{{\mathrm{CaCO}}_3\left(\mathrm{s}\right)}+\underset{\mathrm{Hydrochloric}\mathrm{acid}}{2\mathrm{HCl}\left(\mathrm{aq}\right)}=\underset{\mathrm{Calcium}\mathrm{chloride}}{{\mathrm{CaCl}}_2\left(\mathrm{aq}\right)}+\underset{\mathrm{Carbon}\mathrm{dioxide}}{{\mathrm{CO}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{Water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}$

Therefore, In the laboratory, carbon dioxide is prepared by the action of Calcium carbonate on Hydrochloric acid in Woulfe's bottle.