Question

How do you complete the equation Mg(OH)2(s)+2HCl(aq)→_(aq)+2H2O(l)?

Answer 1

$\large \boxed{ \underline{\bigstar Mg(OH)_2(s) + 2HCl(aq) \longrightarrow MgCl_2(aq)+ 2H_2O(l)}}$

The following reaction is the example of a neutralisation reaction.

$\underline \bold{Neutralisation \: reaction}$

The reaction in which the hydrogen ion $H^{+}$ of an acid is neutralized by hydroxl ion $OH^{-}$ from the alkali to form water molecules, is called a neutralisation reaction.

◼Magnesium hydroxide $Mg(OH)_2$

Magnesium is a alkaline earth Metal with valency +2 which means magnesium needs two electrons to be stable like nearest noble gas aron Hydroxl ion has valency -1so it needs one electron to be stable like nearest noble gas neon.So, when they combine two atoms od hydroxyl gets combined with magnesium forming highly basic compound.

◼Hydrochloric acid $Mg(OH)_2$

Hydrogen have valency -1 , so it need one more electron to be stable like nearest noble helium. Chlorine also have valency -1 so it also needs one electron to be stable like nearest noble gas argon. They both combines by sharing there one one electron with each other and becomes stable by covalent bonds.

Then further its mixed in water where it becomes an acid.