Colligative Properties Exp

Colligative Properties include:

- Boiling point elevation

- Freezing point depression

- vapor pressure decrease

- osmotic pressure alteration

Chemical principles:

- molality (m) = moles of solute/kg solvent [similar to molarity (M)]

- cryoscopic constant (k_f = ...for freezing, k_b = ...for boiling) (see list here)

- van't Hoff factor = an integer value indicating the number of solute particles resulting.

- ΔT = k_f or k_b * m * i

Demonstration:

- Seltzer water...

Experiment:

- temperature (T) of various salt water solutions (m).

- Graph data (m vs T), trendline/linear regression fit, determine cryogenic constant k_f, and print and turn in to instructor.