When vinegar (acetic acid) and baking soda (sodium bicarbonate) mix, they undergo a chemical reaction that produces carbon dioxide gas, water, and sodium acetate. This reaction causes fizzing and bubbling, showing a release of gas—a key sign of chemical change.
Unlike physical changes, the substances form something new. It’s a fun, safe way to visualize chemical reactions and is commonly used in homemade volcano experiments or to inflate balloons with gas