Soda is a kind of chemical raw material, called anhydrous sodium carbonate, also known as soda ash, soda, sodium carbonate decahydrate, soda crystal, hydrated soda, washing soda, washing soda sodium, alkali crystal, crystal soda.
The scientific name of soda is sodium carbonate, an important basic chemical raw material and the main product of the soda ash industry. Usually white powder, easily decomposed at high temperature, easily soluble in water, and the aqueous solution is alkaline.
Sodium carbonate and water generate three hydrates: Na2CO3·10H2O, Na2CO3·7H2O, and Na2CO3·H2O. Among them, Na2CO3·H2O is the most stable and has a very small heat of dissolution in water. It is mostly used in the photographic industry. The product name is Carbon Oxygen.
Na2CO3·10H2O, also known as crystalline alkali or washing alkali, is an endothermic process when it is dissolved in water and is easily weathered in the air. Na2CO3·7H2O is unstable and can be precipitated from saturated sodium carbonate solution only in the range of 32.5～36℃.
Chemical formula: Na2CO3
Molecular weight: 105.99
Appearance: white powder or fine crystals (anhydrous pure product)
Taste: astringent
Relative density (water = 1): 2.532
Melting point: 851°C
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