The relative molecular mass of sodium carbonate is 106, but how to calculate the relative molecular mass of sodium carbonate? Here with me to understand it for your reference.
How to calculate the relative molecular mass of sodium carbonate
The relative molecular mass of sodium carbonate (Na2CO3) is 23 × 2 + 12 + 16 × 3 = 106. The chemical molecular formula is Na2CO3, molecular weight of 105.99. Sodium carbonate at room temperature is a white, odorless powder or fine granular crystals. sodium carbonate absorbs water in the air to form a new chemical substance. Sodium carbonate can absorb moisture from the air to form new chemical compounds, namely Na2CO3-H2O, Na2CO3-7H2O and Na2CO3-10H2O.
Sodium carbonate should be classified as a salt, not as an alkali, despite its name, soda ash.
It is also known as soda or alkali ash in international trade. It is an important organic chemical material, mainly used in the production of flat glass, glass products and ceramic glaze. It is also widely used in life washing, acid neutralization and food processing.
Properties of sodium carbonate1. Properties
Sodium carbonate is a white odorless powder or granule at room temperature. It has water absorption, and gradually absorbs 1 mol/L water (about=15%) in the open air. Its hydrates are Na2CO3-H2O, Na2CO3-7H2O and Na2CO3-10H2O.
2. Solubility
Sodium carbonate is readily soluble in water and glycerol. 20 grams of sodium carbonate can be dissolved in one hundred grams of water at 20°C, and the solubility is the greatest at 35.4°C, when one hundred grams of water can dissolve 49.7 grams of sodium carbonate. 49.7g sodium carbonate, slightly soluble in anhydrous ethanol, insoluble in propanol. The solution is alkaline and can make phenolphthalein red.
3. Chemical properties
The aqueous solution of sodium carbonate is strongly alkaline (pH = 11.6) and has a certain degree of corrosiveness, and can be decomposed with acid, but also with some calcium salts, barium salts, decomposition reaction. There are three kinds of sodium carbonate containing water of crystallization: Na2CO3-H2O, Na2CO3-7H2O and Na2CO3-10H2O.