Answer: 1. water
Explanation:
Neutralization reaction is defined as the chemical reaction in which an acid reacts with a base to produce a salt and water molecule.
[tex]HX+BOH\rightarrow BX+H_2O[/tex]
When hydrochloric acid ad sodium hydroxide combines, the [tex]H^+[/tex] ions from acid combines with [tex]OH^-[/tex] ions from base to form water and sodium chloride [tex]NaCl[/tex] which is soluble in water.
[tex]HCl+NaOH\rightarrow NaCl+H_2O[/tex].
Thus water is always produced in the reaction between hydrochloric acid and sodium hydroxide.
