# What is the difference between hydrogen chloride and potassium chloride?

Aug 6, 2017

Of course hydrogen chloride is polar, i.e. $\stackrel{\delta +}{H} - \stackrel{\delta -}{C} l$, and of course in aqueous solution it ionizes to give stoichiometric ${H}_{3} {O}^{+}$ and $C {l}^{-}$ ions. However, hydrogen chloride is a covalent molecule to a first approximation, and in fact it is supplied in metal cylinders as a gas.