What is the chemical equation for HCl dissolving into water and ionizing?
In other words, every molecule of hydrochloric acid that is added to water will donate its proton,
Hydrochioric acid's ionization will also produce chloride anions,
This means that the chemical equation that describes the ionization of hydrochloric acid will look like this
#color(red)("H")"Cl"_ ((aq)) + "H"_ 2"O"_ ((l)) -> "H"_ 3"O"_ ((aq))^(color(red)(+)) + "Cl"_ ((aq))^(-)#
Notice that every mole of hydrochloric acid that ionizes produces