Question

How can you obtain carbon dioxide gas in the lab, write in points.

Answer 1

It is liberated

(a) by heating strongly metal carbonates except Na2CO3 and K2CO3.

(b) by heating strongly metal bicarbonates.

(c) by the action of dilute HCl or dilute H2SO4 with metal carbonates or bicarbonates.

Answer 2

Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory. Calcium carbonate and hydrochloric acid are usually used because they are cheap and easy to obtain. Carbon dioxide can be collected over water, as shown in the diagram.