Sodium carbonate and sodium bicarbonate solubility is as follows:
Sodium carbonate 20 ℃ every hundred grams of water can dissolve 20 grams of sodium carbonate, 35.4 ℃ when the maximum solubility of 100 grams of water can be dissolved in 49.7 grams of sodium carbonate, slightly soluble in anhydrous ethanol, insoluble in propanol. Sodium bicarbonate solubility in water is less than sodium carbonate, solid 50 ℃ above the beginning of the gradual decomposition of the generation of sodium carbonate, carbon dioxide and water, 270 ℃ when the complete decomposition.
A, sodium carbonate
Sodium carbonate is an inorganic compound, chemical formula Na2CO3, molecular weight of 105.99, also known as soda ash, but the classification belongs to the salt, not a base. Sodium carbonate is a white odorless powder or granule at room temperature. It is water-absorbent and gradually absorbs 1 mol/L of water when exposed to air.
The hydrates are Na2CO3-H2O, Na2CO3-7H2O and Na2CO3-10H2O.
Sodium carbonate is easily soluble in water and glycerol, 20 grams of sodium carbonate can be dissolved in 20 ℃ per 100 grams of water, 35.4 ℃ the maximum solubility of 100 grams of water can be dissolved in 49.7 grams of sodium carbonate, slightly soluble in anhydrous ethanol, difficult to dissolve in propanol.
Two, the physical properties of sodium carbonate
Sodium carbonate is white powder or particles at room temperature. Soluble in water and glycerol, insoluble in ethanol. Aqueous solution is strongly alkaline, pH 11.6. sodium carbonate is a strong alkali salt, dissolved in water after hydrolysis reaction (sodium carbonate hydrolysis will produce sodium bicarbonate and sodium hydroxide), so that the solution is alkaline, has a certain degree of corrosiveness, and can be compounded with acid decomposition reaction.
Stable, but can be decomposed at high temperatures to produce sodium oxide and carbon dioxide. Long-term exposure to the air can absorb moisture and carbon dioxide in the air, generating sodium bicarbonate, and hard lumps. Hygroscopicity is very strong, it is easy to form hard lumps, and does not decompose at high temperatures.
Hygroscopicity is very strong, easily formed into hard lumps, and does not decompose at high temperatures. Solubility, easily soluble in water, slightly soluble in anhydrous ethanol, insoluble in propanol. Sodium carbonate is soluble in water, dissolved in water after the hydrolysis reaction, so that the solution is alkaline, has a certain degree of corrosiveness, can be neutralized with the acid reaction, the generation of the corresponding salt and release of carbon dioxide.