Difference between revisions of "Colligative Properties Exp"

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Experiment:
 
Experiment:
:- temperature of various salt water solutions.
+
:- temperature (T) of various salt water solutions (m).
:- Graph data and show to bes
+
:- Graph data (m vs T), trendline/linear regression fit, determine cryogenic constant k<sub>f</sub>, and print and turn in to instructor.

Latest revision as of 16:57, 21 August 2020

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 (kf = ...for freezing, kb = ...for boiling) (see list here)
- van't Hoff factor = an integer value indicating the number of solute particles resulting.
- ΔT = kf or kb * 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 kf, and print and turn in to instructor.