Solubility of any salt can be determined from_______________?
Correct answer: D. Ksp
- A. Ka
- B. Kb
- C. Kc
- D. Ksp
Explanation
The solubility of a sparingly soluble ionic salt is determined from its solubility product, Ksp, using the ion concentrations in the dissolution equilibrium. Ka and Kb describe acid and base ionization, while Kc is a general equilibrium constant rather than the specific constant used for salt solubility. The likely trap is Kc because Ksp is itself an equilibrium constant, but it is the specially defined one for solubility.
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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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