# HCl is called hydrochloric. How would you write an acid ionization reaction equation for this acid?

$H C l \left(g\right) \downarrow + {H}_{2} O \left(l\right) \rightarrow {H}_{3} {O}^{+} + C {l}^{-}$
Any example of acid base behaviour is modified by the properties of the solvent. Generally, we encounter acid/base behaviour in aqueous solution, and the acidium ion is conceived to be ${H}_{3} {O}^{+}$, likely a cluster of water molecules with an extra ${H}^{+}$ added.