When vinegar and baking soda are combined, carbon dioxide gas is produced. This reaction occurs when the acetic acid in vinegar reacts with sodium bicarbonate in baking soda. The mixture begins to fizz, releasing gas bubbles; this is due to the rapid production of carbon dioxide. This reaction is often used in educational experiments to demonstrate an acid-base reaction and is also employed in various cleaning solutions and homemade volcano experiments. The resulting effervescence can showcase the principles of chemical reactions, making it a fun and engaging activity for both children and adults.