Does the Temperature Change When Magnesium Chloride Is Dissolved in Water?

  Magnesium chloride is an inorganic substance in the form of colorless flaky crystals, which is commonly used in industry as magnesium chloride hexahydrate. It is neutral when dissolved in water, and in industry, it is usually extracted from seawater by injecting seawater into a series of precipitation tanks, and after being exposed to the wind and sun, the magnesium chloride in the seawater will be crystallize, and then heated and evaporated to get magnesium chloride.

  The process of dissolving magnesium chloride in water is exothermic, because magnesium chloride ionizes during dissolution, producing free-moving ions. This process requires the absorption of heat, but it also releases heat energy. This released heat energy occurs since the chemical bonds between its molecules break, creating free-moving ions during the dissolution of magnesium chloride. These ions move quickly through the water and collide with water molecules, thus releasing heat energy.

  In addition, the solubility of magnesium chloride is also related to the exothermic process of its dissolution in water. Solubility means the maximum amount of solute that can be dissolved by a given amount of solvent at a given temperature and pressure. The solubility of magnesium chloride decreases with increasing temperature because the heat energy released during the dissolution process increases the temperature of the solvent, thus affecting the solubility.

From http://www.jiuchongchem.com/.

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