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Information About

Common-ion Effect




The presence of a common ion suppresses the Ionization of a Weak Acid or a Weak Base .


EXAMPLES


:NaC2H3O2(s) → Na+(aq) + C2H3O2-(aq)

:HC2H3O2(l) ↔ H+(aq) + C2H3O2-(aq)

This will decrease the hydrogen ion concentration and thus the common-ion solution will be less acidic than a solution containing only acetic acid.


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