1. Solutions The story continues

2. Heterogeneous mixture  Particles of varied size

3. Heterogeneous mixtures  Suspension – Particles settle out if left alone  Colloids – Based on size of particles and the action of solution (477 table 1)

4. Homogeneous mixtures  You cannot see various parts of the solution. (479 table 2)

5. Concentration  Compares the amount of solute that is in a solvent  Many ways to express this…

6. Concentration  Percent by mass  % by mass = (mass solute/mass solvent)*100

7. Concentration  Percent by volume  % by volume = (volume solute/volume solution)*100

8. Concentration  Molarity  Molarity = (moles solute/liters solvent)

9. Concentration  Molarity

10. Concentration  Molality  Molality = (Moles solute/ Kg solution)

11. Solvation  Surrounding solute with solvent

12. Solvation  Soluble  Insoluble  Miscible  Immiscible

13. Types of Solutions  Unsaturated  Saturated  Supersaturated

14. Factors  Agitation  Surface area  Temperature  Solubility

15. Saturated Solutions  Temperature effect  Sugar in Water

16. Solubility  Page 493  Figure 15

17. Solubility of a gas  Depends on:  Temperature  Pressure  Higher pressure “Pushes” molecules into the solution

18. Solubility of a gas

19. Solubility  10 g of a gas dissolves in 2 L of water. What is the solubility of this gas in water?  3 moles of H 2 dissolves in 10 L of water. What is the solubility of H 2 ?

20. Solubility of a gas

21.  The solubility of a gas is.35 g/l at S.T.P. What is the solubility of the material if the pressure is reduced to.75 atm?

22. Solubility of a gas  At 25°C and 1 atm, 1 g of a gas dissolves in 2 L of water. What mass of the same gas will dissolve in 2 L of water at 25°C and 4 atm?

23.  Find the molarity of the solution formed by dissolving 116.9 g Na Cl in.5 L solution.