Chem 03-25 - Chemistry 102 Test # 3 Material 03/25/08...

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Chemistry 102 Test # 3 Material 03/25/08 Solubility Products Consider the equilibrium that exists in a saturated solution of BaSO4 in water: BaSO4(s) Ba2+(aq) + SO42-(aq) The equilibrium constant for this expression is: Ksp= [Ba2+] [SO42-] The equilibrium constant, Ksp, is called the solubility product . Ksp is NOT the same as solubility Solubility is generally expressed as the mass of solute dissolved in 1L (g/L) or 100 mL (g/mL) of solution, or in mol/L (M). Factors affecting solubility 1. The common-ion effect If one of the ions in a solution equilibrium is already dissolved in the solution, the equilibrium will shift to the left and the solubility of the salt will decrease . BaSO4(s) Ba2+(aq) + SO42-(aq) 2. pH value If a substance has a basic anion , it will be more soluble in an acidic solution Substances with acidic cations are more soluble in basic solutions 3. Complex Ions Metal ions can act as Lewis acids and form complex ions with Lewis bases in the
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Chem 03-25 - Chemistry 102 Test # 3 Material 03/25/08...

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