Question

How is carbon dioxide gas collected during laboratory experiments?

Answer 1

Understanding the concept

• When an acid combines with carbonates and hydrogen carbonates, carbon dioxide is generated.
• In the laboratory, this results in the formation of carbon dioxide.
• Calcium Hydrogen Carbonates or carbonates and hydrochloric acid are used widely.
• Because both carbonates and hydrochloric acid ($\mathrm{HCl}$) are inexpensive and readily available.
• ${\mathrm{CaCO}}_3\left(\mathrm{s}\right)+2\mathrm{HCl}\left(\mathrm{l}\right)\to {\mathrm{CaCl}}_2\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right)\uparrow$

Understanding the diagram :

As indicated in the diagram below, carbon dioxide can be collected over water.

• It can be stored in a dry, Clean, upright gas jar.
• Carbon dioxide(${\mathrm{CO}}_2$) is slightly water-soluble and heavier than air.
• The less dense air is forced out of the gas jar's top.
• Carbon dioxide escapes the delivery tube & enters the gas jar.