Explanation:
A dissociation reaction is defined as a reaction in which a compound dissociates into its constituent particles.
For example, [tex]MgBr_{2} \rightarrow Mg^{2+} + 2Br^{-}[/tex]
For a neutral compound, it is required that the charges must be balanced between the combining atoms.
Here, [tex]MgBr_{2}[/tex] is the neutral compound as charge +2 on one atom of magnesium is balanced by 2 atoms of [tex]Br^{-}[/tex] ion.
Therefore, we can conclude that in total the number of ions produced in the dissociation of [tex]MgBr_{2}[/tex] compound is 3.
