1. 8.5 Solubility and Saturation

2. Video Solubility and solution types

3. Types of Solutions
Saturated solution = a solution that is at its MAXIMUM solute concentration. The solution cannot dissolve any more solute.
Unsaturated solution= a solution that contains LESS than the maximum solute it can hold.
Supersaturated solution= a solution that contains MORE solute than it can normally hold.

4. Types of Solutions

5. Solubility
Definition: The concentration of a saturated solution of a solute in a solvent at a specific temperature and pressure (usually SATP).

6. Solubility Curves
A graph of the solubility of a solute over a range of temperatures.
Each point on the curve represents the maximum amount of solute that will dissolve at that temperature.
Remember: solubility= g of solute per 100 mL of water

7. Example: Solubility Curve of Potassium Nitrate

8. Solubility Curves of Ionic Compounds vs. Gases

9. Comparison of Ionic Compounds vs. Gases

10. How to use a Solubility Curve
Saturated solution= point ON the curve
Unsaturated solution= point BELOW the curve. The vertical difference between a point below the curve and a point on the curve represents the additional mass of solute/100 g of water that is required to saturate the solution.
Supersaturated solution= point ABOVE the curve. The vertical difference between a point above the curve and a point on the curve represents the mass of solute/100 g of water that will crystallize in the solution.

11. Homework
Read pp. 392 – 396
Answer p. 397 # 1 – 6