The concentration of acid before and after dissociation nearly the same in a dilute solution of a weak acid .
Weak acids only dissociate to a very tiny extent when they partially separate. As a result, there won't be much of a change in concentration after dissociation. Its dissociation will not be affected by dilution.
A weak acid is one that partially separates into its ions in water or an aqueous solution. On the other hand, when strong acids are in water, they completely separate into their ions. The conjugate base of a weak acid is also a weak base, and vice versa holds true for the conjugate acid of a weak base.
At the same concentration, weak acids have a lower pH than strong acids. Strong acids are far less common than weak ones. Lemon juice and common vinegar (acetic acid) both include them (citric acid).
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