Question

how could you check that when the calcium carbonate is reacting with hydrochloric acid the gas given off is carbon dioxide

Answer 1

CaCO3 + 2 HCl => CaCl2 + CO2 + H2O

Step-by-step explanation:

CO2 will burst out when the reaction occurs in water, and the ions will be dissociated: Ca(2+) + 2 Cl (-)