Ammonium sulfate is a commonly used chemical substance, and its chemical formula is (NH4)2SO4. Molecular weight refers to the sum of the relative atomic masses of each atom in a molecule. Molecular weight can tell us how much a molecule weighs. For ammonium sulfate, its molecular weight can be calculated by the following steps:
Determine the relative atomic mass of each atom. For example, the relative atomic mass of hydrogen is about 1, nitrogen is about 14, oxygen is about 16, and sulfur is about 32. Multiply the relative atomic mass of each atom by its number in the molecule, and then add these values. For example, there are 2 nitrogen atoms, 4 hydrogen atoms,/kloc-0 sulfur atoms and 4 oxygen atoms in ammonium sulfate.
The molecular weight of ammonium sulfate was obtained by adding the above results. The molecular weight of ammonium sulfate is (14× 2)+(14)+(32+16× 4) = 352. Therefore, the molecular weight of ammonium sulfate is 352. This value tells us the weight of each atom in each ammonium sulfate molecule. In practical application, this information is very important for calculating and analyzing the properties and uses of ammonium sulfate.
Properties of ammonium sulfate:
1, physical properties: ammonium sulfate is white crystal, hygroscopic, soluble in water and insoluble in ethanol. These properties make it necessary to pay attention to moisture protection during production and storage to prevent ammonium sulfate from mixing with water. Ammonium sulfate has a high melting point of 230-280℃, good thermal stability and is not easy to decompose under heating conditions.
2. Chemical properties: ammonium sulfate is a strong acid and weak base salt, and its aqueous solution is acidic. This is because ammonium ions in ammonium sulfate can combine with hydroxyl ions dissociated from water to form ammonia monohydrate, which increases the concentration of hydrogen ions in the solution and presents acidity. Ammonium sulfate can be decomposed into ammonia and sulfur trioxide under heating conditions, and this reaction is reversible. In the process of reaction, temperature and pressure will affect the direction of reaction and products.
3. Biological characteristics: ammonium sulfate is widely used in the biological field. Because it contains ammonium ions and sulfate ions, it can provide nutrition for plants. Especially for sulfur-loving crops, such as rape and wheat, ammonium sulfate can promote their growth and development. Ammonium sulfate can also be used to make pesticides. For example, it can be mixed with calcium hydroxide to make Bordeaux solution, which can prevent and control many plant diseases.