Question

What is the name of $Mg{\left( {OH} \right)_2}$?

Answer 1

Magnesium hydroxide is a laxative that is used to relieve persistent constipation. Magnesium hydroxide is also used as an antacid to treat heartburn, indigestion, and an acidic stomach. Magnesium milk can help with constipation, heartburn, and indigestion. Magnesium milk is also known as magnesium hydroxide, which is the chemical term for it. Magnesia milk may be purchased over the counter without a prescription.

Complete answer:
When a solution of several magnesium salts is mixed with alkaline water, solid $Mg{\left( {OH} \right)_2}$ is precipitated.
$M{g^{2 + }}\; + {\text{ }}2O{H^ - }\; \to {\text{ }}Mg{\left( {OH} \right)_2}$
$MgO + {H_2}O \to Mg{(OH)_2}$
Valency of $Mg$ = $2$
Valency of $OH$ = $1$
Compound formed is $Mg{\left( {OH} \right)_2}$, it’s name is Magnesium Hydroxide.

Additional information:
Magnesium hydroxide is a good heat conductor but a bad conductor of electricity. It's utilised as a laxative or antacid in suspensions. As a food additive, it is used. It is frequently used in the treatment of wastewater. It's a fire-retardant substance. It is used as a photographic fixer in the wet plate collodion process. It's used in the gold mining industry. In warehouses, it's used.
Magnesium hydroxide might cause flushing or sleepiness as a side effect. Electrolyte abnormalities might occur if this chemical is used on a daily basis. Nausea, diarrhoea, and stomach cramps might occur if you use it too much. Watery diarrhoea or gastrointestinal discomfort are possible symptoms. Vomiting, hypotension, disorientation, muscular weakness, cardiac arrhythmias, cardiac arrest, nausea, flushing, thirst, sleepiness, loss of tendon reflexes, respiratory depression, and coma are all signs of poisoning.

Note:
Magnesium hydroxide is used as a base. It has a $pH$ is around 10. Magnesium milk is the common name for magnesium hydroxide. Magnesium hydroxide, unlike lime, is significantly more difficult to treat than caustic ($NaOH$). Magnesium hydroxide is essentially insoluble in water at pH values of neutral and above. Keeping this in mind, above a $pH$ of $7.0$, mag has little to no influence on water alkalinity.