The solubility product Ksp of a sparingly soluble salt is
Correct answer: B. the product of the concentrations of its ions in a saturated solution, each raised to the power of its coefficient
- A. the total mass of the salt dissolved
- B. the product of the concentrations of its ions in a saturated solution, each raised to the power of its coefficient
- C. the concentration of the undissolved solid
- D. the ratio of dissolved to undissolved salt
Explanation
For a saturated solution in contact with excess solid, an equilibrium exists between the solid and its ions, and Ksp is the equilibrium constant for that dissolving process. The concentration of the solid itself is constant and so is not included in the expression. If the ionic product exceeds Ksp a precipitate forms, which is the basis of qualitative analysis.
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About Solubility Product
The solubility product constant, Ksp, represents the equilibrium concentrations of ions from a sparingly soluble salt, each raised to its stoichiometric power. Problems involve writing Ksp expressions, calculating molar solubility, applying the common-ion effect and predicting precipitation from the ionic product.
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