Final answer:
Calcium carbonate chewable tablets are antacids that neutralize stomach acid and alleviate symptoms of heartburn. The reaction between calcium carbonate and hydrochloric acid produces calcium chloride, water, and carbon dioxide gas.
Step-by-step explanation:
Calcium carbonate chewable tablets are commonly taken as antacids to neutralize excess stomach acid and help alleviate symptoms of heartburn. The active ingredient in these tablets, calcium carbonate (CaCO3), reacts with hydrochloric acid (HCl) in the stomach to form calcium chloride (CaCl2), water (H2O), and carbon dioxide gas (CO2). This reaction helps to reduce the acidity in the stomach and provide relief from discomfort. Additionally, the release of CO2 gas can lead to a satisfying burp.