Colligative Properties

Video:
We started off the class with a video on soda slushies. Later in the class we learned why this works.

Colligative property notes:
These kind of properties are physical properties of solutions that depend on how many solute particles are present, NOT on what the solute is.

Aqueous solution equations:
molecular- C6H12O6(s) ---> C6H12O6(aq) 1 mole particles
ionic- NaCl(s)---->Na+(aq) + Cl-(aq)  2 moles particles

This is why ionic compounds are more effective for colligative properties.

Two colligative properties:
The two main properties will focus on are Boiling Point Elevation and Freezing Point Depression.

Boiling Point:
The ions of a solute block the water from escaping. The water requires more energy to escape the container and so the boiling point is raised.

Freezing Point:
When a solid is formed, it can be thought of a crystal forming. More solute in a solution makes the formation of these crystals require more energy. Thus, the freezing point is lowered.

Solubility of Solids v. Gases:
As we as learned, a solid's solubility is increased when the temperature is increased. With gases however, the solubility decreases with an increase in temperature. Another way to affect the solubility of gases is with pressure. By increasing the pressure of a gas, the solubility increases.

Also, I'm sorry that this is late.

The next scribe is:
Daniel W.