2.20 describe the laboratory preparation of carbon dioxide from calcium carbonate and dilute hydrochloric acid

The reaction between any metal carbonate and an acid will form carbon dioxide. Calcium carbonate is the most commonly used metal carbonate in the lab to produce carbon dioxide. The most convenient form of calcium carbonate is marble chips. They are easy to handle and the reaction is not too fast, so the carbon dioxide is produced at a rate that makes it easy to collect.