Question: how to find qsp from ksp?
Answer: Consider the reaction the reaction MX(s) <=> M+(aq) + X-(aq) Qsp is the solubility priduct of the concentration of ions in solution of a dissolving ionic solid. Qsp = [M+][X-] at any concentration. Ksp is the solubility product of the concentration of ions in solution at EQUILIBRIUM with the dissolving ionic solid.