alleryStart learning →Compared with pure water, the solubility of an ionic compound in a solution containing a common ion is:
AJust the same
BWithout limit
CLower than that
DHigher than that
Answer & Solution
Correct answer: C. Lower than that
1. A shared ion pushes the dissolution equilibrium backward.
2. A common ion is one also produced by dissolution of the ionic compound.
3. Compared with pure water, solubility is less in aqueous solutions containing a common ion.
4. That is the common ion effect.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 15 'Equilibria of Other Reaction Classes', sections 15.1-15.3_
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