Sodium carbonate, also known as soda ash or soda powder in daily life, has strong alkalinity. Sodium carbonate, also known as soda powder, has a wide range of uses. It can be used not only as a very important chemical product, but also for the manufacture of other sodium compounds, and can be directly used as detergent. Sodium bicarbonate is a white crystalline powder, which can be dissolved in water. It is a kind of weak alkali. Its alkalinity is not as strong as that of soda powder. It can neutralize gastric acid when taken orally. After heating, sodium bicarbonate can be converted into sodium carbonate.
Thermal stability: sodium carbonate does not decompose when heated; sodium bicarbonate easily decomposes into sodium carbonate, water and carbon dioxide when heated; water solubility: the solubility of sodium carbonate is greater than that of sodium bicarbonate; reaction with carbon dioxide: sodium carbonate can combine with carbon dioxide (with water) to form sodium bicarbonate, but sodium bicarbonate does not react; Reaction with sodium hydroxide: sodium bicarbonate can react with sodium hydroxide to form sodium carbonate and water, but sodium bicarbonate does not react with calcium chloride; reaction with calcium chloride: sodium carbonate can easily form carbonate precipitation with calcium chloride (or barium chloride) solution, but sodium bicarbonate can not easily form precipitation with dilute salt solution; reaction with phenol: sodium carbonate can react with phenol to form sodium phenol and sodium bicarbonate, but carbon dioxide can not Sodium bicarbonate does not react with phenol.
The difference between sodium bicarbonate and sodium carbonate: firstly, the scientific name is different. Sodium bicarbonate is bicarbonate, and sodium carbonate is soda powder. Secondly, the alkalinity of the two is different. The alkalinity of bicarbonate is weaker than that of soda powder. Finally, bicarbonate can be converted into soda powder after heating. Sodium bicarbonate is a kind of acid salt formed by neutralization of strong base and weak acid, which is weakly alkaline when dissolved in water.