The properties of ammonia
Ammonia properties: colorless, pungent smell, lower density than air, quickly dissolved in water.1. Ammonia water will hydrogen bond with water molecules in water to form ammonia monohydrate (NH3·H2O). Ammonia monohydrate can be converted into ammonium salt and hydroxide by a small amount of ammonia water, so ammonia water is weak alkaline and can make phenolphthalide solution turn red.Ammonia reacts with acid to get ammonia, which is mainly used as a refrigerant and in the production of ammonium salts and nitrogen fertilizers.Ammonia is a very strong alkaline gas, is a kind of very strong alkaline gas, while a hydrous ammonia is a kind of weak electrolytes, in certain cases, the ammonia is a very good reduction reaction, the catalytic oxidation product is nitric oxide and ammonia, a hydrous ammonia and ammonium nitrogen in the root are – 3 price, this is the link between the material!2. Ammonia is a colorless gas with a strong pungent taste (urine taste) and is easily dissolved in water.Aqueous solutions with a strong pungent taste are weakly alkaline.It can be compressed at room temperature (critical temperature of 132.4 degrees Celsius, critical pressure of 11.2 mpa, or 112.2 atmospheres).Boiling point -33.5 degrees Celsius.It also solidifies easily into a snow solid.Melting point -77.75 degrees Celsius.Dissolved in water, ethanol and ether.3. In industrial production, most ammonia is synthesized by nitrogen and hydrogen under the action of high pressure, high temperature and catalyst.Nitrogen comes from the atmosphere, while hydrogen comes from hydrogen containing carbon monoxide (pure hydrogen is also hydrolyzed).4. The raw gas of ammonia synthesis is a mixture of nitrogen and hydrogen.The feedstock gas from the fuel chemistry contains sulfides and carbon oxides, which are toxic substances in the ammonia catalyst and need to be purified.