What does the solubility product constant (K_sp) represent in the context of ionic solids?

• A. The equilibrium constant for the dissolution of an ionic solid in water.
• B. The concentration of ions in a saturated solution.
• C. The rate at which an ionic solid dissolves in a solvent.
• D. The maximum amount of solute that can dissolve in a solvent at a given temperature.

Answer: (A)