The solubility of AgI in NaI solution is less than that in pure water because
Correct answer: B. of common ion effect
- A. Agl forms a complex with NaI
- B. of common ion effect
- C. solubility product of Agl is less than that of NaI
- D. the temperature of the solution decreases
Explanation
In the case of the common ion effect, the presence of a common ion in the solution (I-) decreases the solubility or ionization of the compound (AgI) by shifting the equilibrium toward the formation of the undissociated or unionized form. This occurs because the common ion is already present in the solution and its addition (by adding NaI) reduces the need for the compound to dissociate or dissolve further.
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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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