What phenomenon describes the decrease in solubility of a sparingly soluble salt when a soluble electrolyte containing an identical ion is added?
Answer and explanation
Correct answer: B. Common ion effect
- Step 1: Adding a soluble salt increases the concentration of a shared ion in solution. Step 2. By Le Chatelier's principle, the dissolution equilibrium shifts backward to precipitate the solid, decreasing its solubility (common ion effect). Answer: Common ion effect. Why not the others: Salting-in increases solubility of proteins; chelation is complex formation with polydentate ligands; Tyndall effect is light scattering by colloids.
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