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

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.