EVERYDAY SCIENCE

Detailed explanation-1: -What’s happening? These antacid tablets fizz when they come in contact with water because of a chemical reaction. The water reacts with the tablet to create bubbles full of carbon dioxide gas. Chemistry has a lot to do with chemical reactions, but it also studies properties of materials.

Detailed explanation-2: -The antacid tablet contains chemicals that react with each other, causing a chemical change.

Detailed explanation-3: -Effervescent antacid tablets contain an acid, similar to vinegar or lemon juice, and a base, similar to baking soda. When the acid and base are dry like they are in the tablet, they do not react. When they dissolve in the water, they react to produce carbon dioxide gas.

Detailed explanation-4: -Effervescent antacid tablets are made from aspirin, citric acid and sodium bicarbonate. When sodium bicarbonate dissolves in water, it reacts with hydrogen ions from the citric acid and forms carbon dioxide. Because carbon dioxide is a gas, it forms bubbles inside the water that you can see as foam on the surface.