How does the common ion effect affect the solubility of a sparingly soluble salt?
Correct answer: D. It decreases the solubility of the salt
- A. It causes ionization of the sparingly soluble salt
- B. It has nothing to do with the salt
- C. It increases the solubility of the salt
- D. It decreases the solubility of the salt
Explanation
When a highly soluble compound is added to a solution of a sparingly soluble salt and they have a common ion, the common ion prevents the dissociation of the salt. Hence, the common ion effect decreases the solubility of a sparingly soluble salt.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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