The melting point of magnesium chloride is 714 degrees.
The melting point of magnesium chloride is 714 degrees, which is determined by its molecular structure and chemical properties. Magnesium chloride is a compound composed of chlorine atoms and magnesium atoms. There are no valent bonds in its molecular structure, only ionic bonds.
The strength of the ionic bond mainly depends on the ratio of the charges of positive and negative ions to the ionic radius. The greater the ratio, the stronger the ionic bond. Since the charge ratio and ionic radius ratio of magnesium and chlorine are both large, the ionic bond strength of magnesium chloride is very high, which makes magnesium chloride have a higher melting point.
The melting point of magnesium chloride is also affected by other factors. For example, the crystal structure of magnesium chloride is relatively complex, and its melting point is affected by the crystal structure. In addition, the melting point of magnesium chloride is also affected by temperature and pressure.
As the temperature increases, the thermal motion of magnesium chloride molecules increases. When it reaches its melting point, the thermal motion of the molecules is violent enough to destroy the structure of the ionic bond, causing magnesium chloride to change from solid to liquid. Likewise, as pressure increases, the strength of the ionic bonds increases, which also causes the melting point of magnesium chloride to increase.
Application fields of magnesium chloride:
1. Construction industry: Magnesium chloride is used as fireproofing materials, such as gypsum boards and suspended ceilings. Due to its low melting point, it remains stable at high temperatures, preventing the spread of fire. In addition, magnesium chloride can also be used to make glass fiber reinforced concrete to improve the strength and durability of buildings.
2. Ceramics and glass industry: Magnesium chloride is one of the commonly used raw materials in the ceramics and glass industry. It can reduce the shrinkage of materials and increase their hardness and chemical stability. In glass, magnesium chloride can slow down the corrosion and aging process of glass and improve its durability.
3. Medical field: Magnesium chloride has many uses in medicine. It is used to make anticonvulsants and anti-allergy medications, such as magnesium sulfate injections, which can relieve preeclampsia in pregnant women. In addition, magnesium chloride can also be used to make some special medical equipment, such as surgical instruments and prostheses.
4. Agricultural field: Magnesium chloride can be used as fertilizer, especially in saline-alkali soil. Because it improves the soil, it can increase crop yield and quality. In addition, magnesium chloride can also be used to make pesticides to prevent and control plant diseases and insect pests.
5. Other fields: In addition to the above fields, magnesium chloride can also be used in the production and processing of water treatment, environmental protection, new energy and other fields.