Difference between revisions of "Colligative Properties Exp"

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Chemical principles:
 
Chemical principles:
 
:- molality (m) = moles of solute/kg solvent [similar to molarity (M)]
 
:- molality (m) = moles of solute/kg solvent [similar to molarity (M)]
:- cryoscopic constant (kf = ...for freezing, kb = ...for boiling) (see list [https://en.wikipedia.org/wiki/List_of_boiling_and_freezing_information_of_solvents here])
+
:- cryoscopic constant (k<sub>f</sub> = ...for freezing, k<sub>b</sub> = ...for boiling) (see list [https://en.wikipedia.org/wiki/List_of_boiling_and_freezing_information_of_solvents here])
 
:- van't Hoff factor = an integer value indicating the number of solute particles resulting.
 
:- van't Hoff factor = an integer value indicating the number of solute particles resulting.
:- ΔT = k<sub>f</sub>/k<sub>b</sub> x m x i
+
:- ΔT = k<sub>f</sub> or k<sub>b</sub> x m x i
  
 
Demonstration:
 
Demonstration:

Revision as of 16:56, 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 x m x i

Demonstration:

- Seltzer water...

Experiment:

- temperature of various salt water solutions.
- Graph data and show to bes