# With respect to acids, what do we mean by "ionization"?

$H C l \left(a q\right) + {H}_{2} O \left(l\right) r i g h t \le f t h a r p \infty n s {H}_{3} {O}^{+} + C {l}^{-}$
The charge separation that the acid undergoes upon protonolysis, i.e. its donation of a proton to the solvent molecule, is the so-called $\text{ionization.}$