Question

Which of the following are present in a dilute aqueous solution of $HCl$?

• A. $H_3{O}^{+}+C{l}^{-}$
• B. $H_3{O}^{+}+O{H}^{-}$
• C. $C{l}^{-}+O{H}^{-}$
• D. Unionised $HCl$

Answer 1

The correct option is A $H_3{O}^{+}+C{l}^{-}$

In the aqueous solution $HCl$ gives a hydrogen as a proton which reacts with water to give hydronium ions. Hydroxyl ions are not formed in the case of strong acids but are formed when any base with hydroxyl ions dissociates from the base in its aqueous solution.
$HCl\left(g\right)\leftrightarrow H^{+}+{Cl}^{-}\stackrel{Aqueoussoln.}{\to }{H}_3{O}^{+}+{Cl}^{-}$