The complete guide to leavening agents and chemical …
Baking soda. Baking soda, a.k.a sodium bicarbonate or bicarbonate of soda, has the chemical formula NaHCO3 and is a dry powder that requires an acid to react and form the gas carbon dioxide. Recipes that are made with baking soda also have an acid on the ingredient list (vinegar, lemon juice, buttermilk, yogurt, sour cream, etc.).