When sparingly soluble salt is in equilibrium with molar concentration of its oppositely charged ion when the product is called_________________?
Correct answer: B. solubility product
- A. common ion effect
- B. solubility product
- C. dissociation constant
- D. dissociation constant for an acid
Explanation
For a sparingly soluble salt at equilibrium, the product of the molar concentrations of its ions, each raised to its stoichiometric power, is called the solubility product, Ksp. The common-ion effect is the decrease in solubility caused by an already present ion, not the concentration product itself. Students may choose common-ion effect because the definition mentions an oppositely charged ion, but the named product is Ksp.
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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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