Sodium bicarbonate, chemical formula NaHCO 3, commonly known as baking soda. White fine crystals, the solubility in water is less than sodium carbonate. It is also an industrial chemical. Solids begin to decompose gradually above 50 ° C to form sodium carbonate, carbon dioxide and water, and decompose completely at 270 ° C.
Sodium bicarbonate is an acid salt produced by the neutralization of a strong base and a weak acid, and it is weakly alkaline when dissolved in water. This feature can be used as a leavening agent in the production of food. Sodium bicarbonate will remain sodium carbonate after the action, and excessive use will make the finished product smell alkaline.
Sodium bicarbonate is white crystal, or fine crystal of opaque monoclinic system. The proportion is 2.15. Odorless, non-toxic, salty, soluble in water, slightly soluble in ethanol. It is soluble in 10 parts of water at 25 ° C and 12 parts of water at about 18 ° C. Its aqueous solution is slightly alkaline due to hydrolysis. It is stable at room temperature and easily decomposes when heated. It gradually decomposes above 50 ° C. It loses carbon dioxide completely at 270 ° C. There is no change in dry air and it slowly deliquesces in humid air.
