Baking powder and baking soda chemistry knowledge
- 2020-06-22-


Soda is a transliteration of Soda, and its chemical formula is Na2CO3. The scientific name is sodium carbonate. Besides soda, its common name is also called soda ash or soda powder. The one with crystal water is called hydrated sodium carbonate.
Anhydrous sodium carbonate is white powder or fine particles, easily soluble in water, and its aqueous solution is alkaline. It has strong hygroscopicity and can absorb moisture in the air and form hard lumps.
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 industries such as glass, soap, textile, paper and leather. It is also used in the metallurgical industry and purified water. It can also be used in the manufacture of other sodium compounds.

Baking powder and baking soda:
The chemical formula of baking soda is NaHCO3. The scientific name is sodium bicarbonate, and the common name is baking soda.
Baking soda is white crystals, soluble in water, and the aqueous solution is weakly alkaline. In hot air, it can slowly decompose and release part of carbon dioxide; when heated to 270℃, all part of carbon dioxide is released.
Baking soda has 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; in the manufacture of refreshing drinks, it is also a commonly used raw material; in medical treatment, it is used to treat stomach acid Too much medicine.

Soda is the common name of sodium thiosulfate, also called Haibo (Hypo transliteration), with five crystal waters (Na2S2O3•5H2O), so it is also called sodium thiosulfate pentahydrate.
Soda is a colorless and transparent crystal, easily soluble in water, and its aqueous solution is slightly alkaline. It weathers in the dry air above 33℃ and loses crystal water. It is relatively stable in neutral and alkaline solutions, and decomposes rapidly in acidic solutions.
Soda soda has a strong complexing ability and can form complexes with silver bromide. It can be used as a fixer.
Soda also has strong reducibility and can reduce chlorine and other substances.
It can also be used as a dechlorination agent for cotton fabrics after bleaching. Similarly, iodine stains on fabrics can also be removed with it.
In addition, large soda is also used for tanning leather, electroplating and extracting silver from ore.
In the middle school stage, we mainly learn about soda and baking soda. Soda is generally not emphasized.

Tips: Which soda is in the soda?
Soda water is an aqueous solution of sodium bicarbonate (baking soda), which contains weak alkalinity. It can be disinfected for external use in medicine. Drinking can neutralize the acid-base balance in the human body and change the acidic body. Most of the sodas on the market are artificially synthesized carbonated drinks in which carbon dioxide is pressed into purified drinking water and sweeteners and spices are added.