1. Solubility

2. Solubility
Ability of one substance to dissolve in another at a given temp and pressure
Usually measured as mass (g) of solute in 100g H2O at a given temp
Saturated- max amount of solute at a given temp
If more solute is added, it will not dissolve
Unsaturated- less than max amount of solute at a given temp
If more solute is added it will dissolve up to the point of saturation
Supersaturated – more than max amount of solute at a given temp
Saturated solution made at a higher temp then cooled. The solute remains dissolved in the solution.
Example: Sweet Tea

3. Supersaturated Solutions
Saturated solution made at a higher temp then cooled. The solute remains dissolved in the solution.
Often if disturbed or if additional crystals (seed crystals) are added recrystallization of solute will occur
The amount of solute that recrystallizes is the amount above the saturation point for the new temp
Example: rock candy
Not all solutions can become supersaturated
When cooled recrystallization occurs as the solution cools

4. Solubility Curves
Lines show saturation for that substance in 100g H2O at various temps
Points above line supersaturated
Points below line unsaturated

5. If a saturated solution of KNO3 at 80 ⁰C was cooled to 20 ⁰C, what mass of crystals would form?
How many g NaCl would be dissolved 300mL of a saturated soution at 60 ⁰C?
What is the solubility of NaClO3 at 40⁰C? If a solution at 60 ⁰C contains 110g KBr is it US, S, or SS?