Write the dissociation equation for the salt
Express the solubility product constant, Ksp, in terms of ion concentrations
Let the molar solubility be s
Substitute ion concentrations in terms of s into the Ksp expression
Solve the resulting equation for s
Use the appropriate stoichiometric coefficients from the balanced equation
If common ions are present, include their initial concentrations in the Ksp expression
If the salt has very low solubility, use the Ksp approximation only when valid
Check that the calculated s has units of mol/L
For salts with more complex formulas, account for the correct ion ratios before solving