Applications of conductivity measurements: Calculating the solubility product of a partially soluble salt (Lab report) Theory The solubility of poorly soluble salts is expressed as the solubility product. That is the product of the concentration of ions in the solution which are in equilibrium with the solid ion. These concentrations can be determined via conductivity measurements. In this practical PbSO 4 is used. PbSO 4 ⇌ Pb 2+ + SO 4 2- Assume concentration of solid is a constant. Concentration of Pb 2+ = concentration of SO 4 2- = C \ Ksp = [Pb 2+ aq ] [SO 4 2- a...