Question

Which of the following is true about hydrated magnesium chloride $ MgC{l_2}.6{H_2}O $ ?
A) $ 100 $ grams of water dissolves about $ 140 $ grams of $ MgC{l_2}.6{H_2}O $ at room temperature
B) $ 100 $ grams of water dissolves about $ 365 $ grams of $ MgC{l_2}.6{H_2}O $ at $ 100 $ deg C
C) $ MgC{l_2}.6{H_2}O $ reacts with alcohol to form $ MgC{l_2}.6{C_2}{H_5}OH $
D) All of the above

Answer 1

Hint: Magnesium chloride is the name for the compound with the chemical formula $ MgC{l_2} $ and its various hydrates have the formula $ MgC{l_2}{\left( {{H_2}O} \right)_X} $ . Hydrated magnesium chloride is the form most readily available. The solubility of hydrated magnesium chloride increases with temperature.

Complete answer:
Magnesium chloride hexahydrate is the magnesium salt of the hydrochloric acid, HCl usually extracted from seawater/ brine. The hydrated magnesium chloride can be extracted from brine or seawater.
The solubility of magnesium chloride hexahydrate at room temperature is $ 140g/100g $ of water. But as the temperature increases, the solubility increases too. At $ {100^ \circ }C $ , the solubility increases to
  $ 365 $ grams per $ 100 $ gram.
  $ MgC{l_2}.6{H_2}O $ reacts with alcohol to form $ MgC{l_2}.6{C_2}{H_5}OH $ .
Hence all given statements are correct, so the right option is D All of the above.

Note:
Magnesium chloride is a mineral supplement used to prevent and treat low amounts of magnesium in the blood and a versatile compound with a series of uses in areas of food, health, and personal wellness. Chloride magnesium is also used in road care, synthesizing magnesium compounds, eliminating industrial dyes, dust control, textile production, and a dye type removal device. Moderate magnesium chloride is used as a catalyst for organic synthesis. Hexahydrate chloride magnesium is also a promising thermal/thermal storage material.