Skip to main content
Is HClO a Strong Acid?

No, HClO is not a strong acid.

Explanation:

Acids are classified into strong and weak acids depending on their ionization in aqueous solutions.

When water is added to strong acids, they completely and irreversibly break down into ions. For instance, hydrochloric acid. It fully dissolves in water, and all the molecules of HCl ionize as follows:

HCl H+ + Cl

Weak acids, on the other hand, do not ionize completely. An aqueous solution with weak acids yields ions, but not all acid molecules break down. Even if a minuscule percentage of the acid remains intact, it is considered to be a weak acid. 

HClO, or hypochlorous acid, is such an acid. When added to water, it only dissociates partially.

HClO  ClO + H+

The double-sided arrow indicates that the ionization is reversible, another characteristic of weak acids.

Most acids are weak. In fact, there are only seven strong acids:

  • hydrochloric acid (HCl)
  • sulphuric acid (H2SO4)
  • nitric acid (HNO3)
  • hydrobromic acid (HBr)
  • hydroiodic acid (HI)
  • chloric acid (HClO4)
  • perchloric acid (HClO3)

All other acids, including hypochlorous acid (HClO), are weak acids.


SHOW MORE TEXTBOOK SOLUTIONS+