Solubility Product Constant
Definition and meaning of Solubility Product Constant in chemistry.
The solubility product constant is the equilibrium constant for the dissolution of a sparingly soluble ionic compound in an aqueous solution.
In more detail
Denoted by the symbol Ksp, this specific numerical value indicates the maximum extent to which a solid compound can dissolve to form a saturated solution. It is calculated by mathematically multiplying the equilibrium molar concentrations of the dissolved constituent ions, with each concentration raised to the power of its stoichiometric coefficient from the balanced dissolution equation. A higher Ksp value generally indicates a more soluble compound, while a lower Ksp value means the solid substance is considerably less soluble.
Key facts
| Field | General Chemistry |
|---|---|
| Symbol | Ksp |
| Formula Example | AgCl |
For the dissolution of solid silver chloride (AgCl), the mathematical expression for the solubility product constant is written simply as Ksp = [Ag+][Cl-].
Frequently asked questions
Does Ksp depend on temperature?
Yes, the solubility product constant is highly dependent on temperature, usually increasing as temperature rises.
How is Ksp different from standard solubility?
Solubility is the maximum amount of solute that can dissolve in a given volume, while Ksp is an equilibrium constant that describes the relationship between the concentrations of the constituent ions.