Molar Solubility
What is Molar Solubility?
Molar solubility is the number of moles of a sparingly soluble salt that dissolves per liter of solution to form a saturated solution at a given temperature. It is related to the solubility product constant (Ksp) by stoichiometry; for example, for CaF₂ dissolving as Ca²⁺ + 2F⁻, Ksp = [Ca²⁺][F⁻]² = (s)(2s)² = 4s³. Molar solubility decreases in the presence of a common ion (common ion effect) and increases with complexation or changes in pH for salts of weak acids or bases.
Key Facts
Frequently Asked Questions
Molar solubility is the number of moles of a sparingly soluble salt that dissolves per liter of solution to form a saturated solution at a given temperature. It is related to the solubility product constant (Ksp) by stoichiometry; for example, for CaF₂ dissolving as Ca²⁺ + 2F⁻, Ksp = [Ca²⁺][F⁻]² = (s)(2s)² = 4s³. Molar solubility decreases in the presence of a common ion (common ion effect) and increases with complexation or changes in pH for salts of weak acids or bases.