Baking soda (sodium bicarbonate) is a small white crystal with a lower solubility in water than sodium carbonate. Baking soda is an acidic salt formed by the neutralization of strong alkali and weak acid. When dissolved in water, it exhibits weak alkalinity, which makes it a leavening agent in the food production process. Baking soda has the effects of relieving acid reflux, regulating uric acid, and deodorizing.