# What is the formula for hydrochloric acid?

Nov 20, 2016

Formally it is $H C l \left(a q\right)$.

#### Explanation:

$\text{Hydrogen chloride}$ is a gas at room temperature, $\text{boiling point } = - {85.1}^{\circ}$ $C$.

$\text{Hydrogen chloride}$ is exceptionally water soluble, in which solvent it undergoes almost complete ionization:

$H C l \left(g\right) + {H}_{2} O \left(l\right) \rightarrow {H}_{3} {O}^{+} + C {l}^{-}$

The anion and the cation are solvated by several water molecules.