Definition and nature of sodium bicarbonate_sodium bicarbonate supplier
(1) Definition of sodium bicarbonate
Soda Ash (Soda Ash), also known as soda, soda ash, alkaline surface or washing alkali, is composed of sodium carbonate, molecular formula is Na2CO3 and molecular weight is 105.99. sodium bicarbonate is an important basic chemical raw material and one of the two bases in the "tribasic acid". It is widely used in many fields of the national economy, such as building materials, petrochemicals, metallurgy, food, textiles, defense, medicine, Occupy a very important position.
(2) Sodium carbonate-physical properties
Sodium carbonate is an odorless white powder or granule at room temperature. It has water absorption and gradually absorbs moisture in the air. There are three types of sodium carbonate hydrates: Na2Co3 · H2O, Na2Co3 · 7H2O and Na2Co3 · 10H2O. Sodium carbonate is easily soluble in water and glycerin, slightly soluble in absolute ethanol, and hardly soluble in propanol. Dissolve 20g of sodium carbonate per 100g of water (at 20 ° C), the maximum solubility is 35.4 ° C, and dissolve 49.7g of sodium carbonate per 100g of water.
(3) Sodium carbonate-chemical properties
Sodium carbonate is the sodium salt. Sodium carbonate is hydrolyzed in an aqueous solution, and carbonate ions combine with hydrogen ions in water to form bicarbonate ions, resulting in a reduction of hydrogen ions in the solution, leaving ionized hydroxide ions, so the aqueous solution is alkaline (PH = 11.6). Sodium carbonate has certain corrosivity and strong stability, but it can be decomposed into sodium oxide and carbon dioxide at high temperature. When exposed to air for a long time, sodium carbonate absorbs moisture and carbon dioxide in the air, producing sodium bicarbonate.
