"Ksp" stands for solubility product constant. It is the equilibrium constant for a substance that is solid dissolving in a solvent forming an aqueous solution. It describes the degree at which the solute would dissolve in the solution. It calculated by the product of the equilibrium concentration of the dissociated ions in the solutions. These concentrations should be in the units of molarity or mol/ L. The general dissociation reaction would be expressed as follows:
AB = A+ + B-
The molarity of the species is as follows:
[AB] = [A+] = [B-] = 0.0700 mol AB / 1.00 L solution = 0.0700 M
Ksp = [A+] [B-]
Ksp = (0.0700) (0.0700)
Ksp = 0.0049
Therefore, the Ksp of the generic salt AB would be 0.0049