1. The colligative properties are boiling point, freezing point, osmotic pressure, and vapor pressure.

2. OK what are the four colligative properties?

3. So we're going to start colligative properties.

4. Any questions on azeotropes, before we get to colligative properties?

5. When we get to the colligative properties, we'll attack it from the point of chemical potentials.

6. There are four colligative properties, and you already know what they are.

7. And these colligative properties are properties that you use all the time in your day to day life.

8. Colligative properties are the properties like the vapor pressure, lowering when you have a mixture in a liquid, instead of having a pure substance you have amixture of substances here.

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9. Expounds the mechanism of freezing point depression from the viewpoint of free energy and colligative properties.

10. But this is sort of the first indication that these colligative properties are all connected to each other.