The Acidic Environment‎ > ‎3. Acids‎ > ‎

Strong and Weak Acids

Describe the difference between a strong and a weak acid in terms of an equilibrium between the intact molecule and its ions  


  • For strong acids, ionisation equilibria are not established, as complete ionisation occurs.
  • For example, the ionisation of hydrochloric acid does not form an equilibrium:
  • For weak acids, ionisation equilibrium are established, as only partial ionisation occurs.
  • For example, the ionisation of acetic acid forms an equilibrium:

Easychem - Strong and Weak Acids


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