1. P.O.D.2-17-16 1.What is the new pressure of a 2 L gas sample when the temperature increased from 100 C to 132 C and the pressure was initially measured at 2 atm? 2.What is the temperature, of 0.250 mol of oxygen gas at 20 L and 0.947 atm? Agenda -Chapter 13 “Solutions” notes

2. Chapter 13-1: Solutions The answers to all your problems…

3. Solutions Contain 2 ingredients: solute and solvent Solute = being dissolve Solvent = primarily doing the dissolving Example: salt + water metal + acid

4. Solutions Homogeneous mixtures Particles are evenly distributed throughout the liquid Particles will not settle out over time (stable)

5. Suspensions A suspension is a heterogeneous mixture Particles may remain mixed with the liquid when stirred but will eventually settle

6. Colloids Colloids are stable heterogeneous mixtures They appear to be homogeneous, but under a microscope you can see other particles Example: Milk appears uniform, however, it has particles of fat and proteins that do not settle out

7. Separating Mixtures Decanting- pour off the liquid after a solid has settled out Centrifuge- spinning separates substances of different densities Filtration- put the solution through filter paper Evaporation

8. Separating Mixtures Distillation- separation based on different boiling points of substances Chromatography- separates mixtures based on how quickly different molecules dissolved in a mobile phase solvent move along a solid phase

9. Separating Mixtures Decanting

10. Separating Mixtures Centrifuge

11. Separating Mixtures Distillation-

12. Separating Mixtures Chromatography-

13. Replacement Credit Opportunity (50 pts) Must be missing at least one 100+ point assignment Must sign-up to complete work Detailed instructions on website – go to the section “Missing Points?” Due March 4 before 3PM Extra credit options available soon