Lesson-specific original diagram for Ksp and molar solubility for non-1:1 salts. Model: K sp =( nu +s) nu + ( nu -s) nu -. It supports this lesson focus: Dissociation stoichiometry must be carried into ion concentrations before solving for molar solubility. Text-only equivalent: use the model statement, identify variables/species, then connect the representation to the lesson calculation and evidence check.