For the following acid-base neutralization reactions, determine the acid, name of each. Then balance the reaction. 12. underline ( )HCl+underline ( )Mg(OH)_(2)arrow underline ( )H_(2)O+underline ( )MgCl_(2)

In the given reaction, HCl is the acid because it donates a proton (H+) to the base, Mg(OH)2. The name of HCl is hydrochloric acid. The reaction is a neutralization reaction where an acid reacts with a base to produce water and a salt. The balanced chemical equation for the reaction is 2HCl + Mg(OH)2 → 2H2O + MgCl2. This is because there are two hydrogen atoms in HCl and two hydroxide ions in Mg(OH)2, so they combine to form two water molecules. The magnesium ion in Mg(OH)2 combines with two chloride ions from HCl to form MgCl2.