What is the solubility product (Ks) of a saturated solution?

The solubility product (Ksp) of a saturated solution is a constant value at a specific temperature, making the option that states it remains constant at a given temperature the correct choice. This constant reflects the equilibrium between the dissolved ions in a saturated solution and the undissolved solid.

For any sparingly soluble salt in solution, the Ksp indicates the extent to which the salt can dissolve. As long as the temperature remains unchanged, the Ksp remains constant because it is derived from the equilibrium concentrations of the ions in the saturated solution.

Variations in pressure typically do not significantly affect the solubility of solids and liquids, meaning that the Ksp won't change due to pressure changes, which eliminates that as a valid option. While Ksp can increase with rising temperature for many salts due to increased solubility, it does not increase indefinitely; some salts may also have decreased solubility at higher temperatures. Thus, options discussing indefinite increases or decreases in solubility with temperature or additional solute are not accurate representations of Ksp behavior.