Why when you add vinniger it fomes?

When vinegar is added to a substance like baking soda, a chemical reaction occurs between the acetic acid in the vinegar and the sodium bicarbonate in the baking soda. This reaction produces carbon dioxide gas, which forms bubbles and creates foam. The rapid release of gas is what causes the fizziness and frothing effect. This reaction is often used in science experiments and cooking to create a leavening effect in baked goods.