The function of sodium hydroxide solution is to remove or absorb the acid gas impurities mixed in the gas, such as carbon dioxide, sulfur dioxide, nitrogen dioxide, hydrogen chloride, hydrogen fluoride, etc. In addition, it can also dissolve ammonia gas, remove sulfur dioxide and other harmful gases in the exhaust gas, and protect the environment. . The sodium hydroxide solution in life can remove the oil stains in the kitchen.
How to store sodium hydroxide solution
1. Solid sodium hydroxide must be sealed during storage, because sodium hydroxide is easy to deliquescence, and more importantly, sodium hydroxide easily reacts with carbon dioxide in the air to generate sodium carbonate and water, so that sodium hydroxide deteriorates. Therefore, the storage of solid sodium hydroxide or sodium hydroxide solution should be sealed.
2. Note that glass bottles for storing sodium hydroxide solution cannot use glass stoppers (usually wooden stoppers), because ordinary glass contains more silicon dioxide, and sodium hydroxide can react with silicon dioxide: 2NaOH+SiO2 =Na2SiO3+H2O. The resulting sodium silicate can make the glass stopper stick to the glass bottle and make it difficult to open.
