Question

How do you complete the equation \[Mg{\left( {OH} \right)_2}\left( s \right){\text{ }} + 2HCl\left( {aq} \right){\text{ }} - - - - - > {\text{ }}\left( {aq} \right){\text{ }} + 2{H_2}O\left( l \right)?\]

Answer 1

Hint: The neutralization reaction is the reaction among \[Mg{\left( {OH} \right)_2}\] (a weak base) and \[HCl\] (a strong acid). This is basically an acid-base reaction, which we may signify by the balanced net ionic reaction:
\[Mg{\left( {OH} \right)_2}\left( s \right) + 2{H^ + } \to M{g^{2 + }} + 2{H_2}O\left( l \right)\]

Complete step by step answer:
\[Mg{\left( {OH} \right)_2}\left( s \right){\text{ }} + 2HCl\left( {aq} \right){\text{ }} - - - - - > MgC{l_2}\left( {aq} \right){\text{ }} + 2{H_2}O\left( l \right)\]
The accompanying reaction is the case of a balance reaction.
The reacting kind for the strong acid, \[HCl\] , is the hydrogen ion, \[{H^ + }\]. In contrast, since \[Mg{\left( {OH} \right)_2}\] is a weak base, the principal reacting kind is the undissociated \[Mg{\left( {OH} \right)_2}\] molecule. The acid–base reaction includes the \[Mg{\left( {OH} \right)_2}\] molecule and the \[{H^ + }\] ion as reactants. The products are a \[{H_2}O\] molecule and a \[M{g^{2 + }}\] ion in solution. For the chloride ion, \[C{l^-},\] from \[HCl\] is a spectator ion, it is not included in the net ionic equation.
The reaction where the hydrogen particle \[{H^ + }\] of an acid is killed by a hydroxyl particle \[O{H^ - }\] from the salt to frame water atoms, is known as a balance reaction.
-Magnesium hydroxide
Magnesium is an antacid earth Metal with valency \[ + 2\] which implies magnesium needs two electrons to be steady similar to closest honorable gas aron Hydroxyl particle has valency \[-{\text{ }}1\] so it needs one electron to be steady similar to closest respectable gas neon.So, when they join two iotas od hydroxyl gets joined with magnesium framing profoundly fundamental compound.
-Hydrochloric acid
Hydrogen has valency \[ - {\text{ }}1\] , so it needs one more electron to be steady, similar to closest honorable helium. Chlorine additionally has valency \[\; - {\text{ }}1\] so it likewise needs one electron to be steady similar to the closest respectable gas argon. The two of them join by sharing their one electron with one another and get steady by covalent bonds.
At that point further it blends in water where it turns into an acid.

Additional information:
Number of protons present inside the nucleus in an atom is also calculated by knowing the atomic mass \[\left( A \right)\] and number of neutrons as follow atomic mass \[\left( A \right)\] and number of neutrons as follow:
Atomic mass \[\left( A \right)\] = No. of protons +No. of neutrons.

Note:
Magnesium hydroxide is confidential as a weak base due to its very limited solubility in water. Whereas \[Mg{\left( {OH} \right)_2}\;\;\] is practically insoluble, a definite quantity of \[Mg{\left( {OH} \right)_2}\]dissociates into ions when put in water.