1. Drill (pd 3, 4A) /12/2015
Predict how to separate each of the following heterogeneous mixtures:
Colors from black ink
Sand and iron filings
Mud (dirt from the water)
Fruit salad (the different types of fruit)
Salt from salty water
Pasta and water
Oil and vinegar

2. Objectives
SWBAT demonstrate their knowledge of colligative properties by completing problems.
SWBAT describe and choose appropriate separation techniques for mixtures.

4. 7 Techniques for Physical Separations
Filtration
Distillation
Crystallization
Chromatography
Evaporation
Centrifugation
Decantation

5. Assignment 1. I will divide you into groups of 4
2. Complete the Separating Mixtures Table completely using the following:
Packets on distillation, crystallization, and chromatography
Black Modern Chemistry textbook
Internet
3. Each person in group is assigned a different technique. Shares with group.

6. Filtration
A mixture is poured into a funnel fitted with a piece of filter paper.
Used for beer production and tap water (to remove solid impurities)

7. Distillation
When a solution is heated, the liquid with a lower boiling point evaporates. The hot vapor that formed can be condensed back to liquid again on a cold surface. EVAPORATION + CONDENSATION

8. Crystallization
The process of forming crystals. Used to separate solids from solution.

9. Chromatography
A mixture is allowed to move along a fixed material. The components of the mixture move at different speeds (based on their attraction to the solvent and the material) and so they separate from each other.

10. Each section is a fraction of the original sample

11. Chromatography 2 phases:
Stationary phase = What you run your sample through . We will use a column. The column is non-polar
Mobile phase = The solvent that is run through the column. We will use water and isopropyl alcohol.

12. Evaporation
A homogenous mixture is heated so that the water evaporates and just leaves the solid behind

13. Centrifugation
Really fast spinning forces the solid or denser substance to the bottom of a sample

14. Decantation
Let the solid settle and then pour off the liquid, using something to block the solid

15. Chemical Separations
Electrolysis
Chemical Reactions
Decomposition

16. Electrolysis
Using electric current to force a chemical reaction with a separation occurring at the electrodes

17. Wrap up
During distillation, which liquid evaporates?