Chemical formula of soda ash: Na2CO3
1. Soda
Soda is the transliteration of Soda, and its chemical formula is Na2CO3. It has many names. Its scientific name is sodium carbonate. In addition to its common name of soda, it is also called soda ash or soda ash. The one with crystal water is called hydrated sodium carbonate, and there are three types: sodium carbonate monohydrate (Na2CO3·H2O), sodium carbonate heptahydrate (Na2CO3·7H2O) and sodium carbonate decahydrate (Na2CO3·10H2O). Sodium carbonate decahydrate is also called washing soda, washing soda or crystal soda.
Anhydrous sodium carbonate is white powder or fine particles, easily soluble in water, and the aqueous solution is alkaline. It is highly hygroscopic and can absorb moisture in the air and form hard lumps. Sodium carbonate decahydrate is a colorless crystal. When placed in the air at room temperature, it will lose crystal water and become sodium carbonate monohydrate. Both sodium carbonate decahydrate and sodium carbonate monohydrate will turn into anhydrous sodium carbonate when heated. Sodium carbonate is very stable and does not decompose easily when heated. It can release carbon dioxide when meeting acid:
Na2CO3 2HCl====2NaCl H2O CO2↑?
Sodium carbonate solution can also absorb carbon dioxide to form sodium bicarbonate:
Na2CO3 H2O CO2====2NaHCO3
Among the three types of soda, sodium carbonate is the most widely used. It is a very important chemical product and an important raw material for glass, soap, textile, papermaking, leather and other industries. It is also used in the metallurgical industry and in water purification. It is also used in the manufacture of other sodium compounds. As early as the 18th century, it was listed as one of the basic chemical raw materials - three acids and two alkali, along with sulfuric acid, hydrochloric acid, nitric acid and caustic soda. Soda also has many uses in daily life. For example, it can be used directly as a detergent. Adding some soda when steaming steamed buns can neutralize the acidic substances produced during the fermentation process.
2. Baking soda
The chemical formula of baking soda is NaHCO3. It also has many names. Its scientific name is sodium bicarbonate, also known as sodium bicarbonate or sodium acid carbonate. In addition to baking soda, common names include baking soda, fermented soda, and heavy alkali.
Baking soda is white crystal, soluble in water, and the aqueous solution is weakly alkaline. In hot air, it can slowly decompose and release a part of carbon dioxide; when heated to 270°C, all carbon dioxide will be released.
2NaHCO3====Na2CO3 H2O CO2↑, it can also react with acid (such as hydrochloric acid) to release carbon dioxide:
NaHCO3 HCl====NaCl H2O CO2↑
These properties of baking soda make it have many important uses in production and life. In fire extinguishers, it is one of the raw materials that produce carbon dioxide; in the food industry, it is a main raw material for baking powder; it is also a commonly used raw material when making refreshing drinks; in medicine, it is used to treat gastric acid Too much of one potion