Equilibrium Between Nitrogen Dioxide and Dinitrogen Tetroxide
Effect of Pressure on Melting Point of Ice
The Liquid Phase of Carbon Dioxide
Vapor Pressure of Pure Liquids
Getting Colder: Freezing-Point Depression
Getting Hotter: Boiling-Point Elevation by Nonvolatile Solutes
Osmotic Pressure of a Sugar Solution
Vapor Pressure of Solutions: Raoult’s Law
Boiling Two Liquids at Room’s Temperature
Salting Out: Making Liquids Immiscible
Electrolysis of Potassium Iodide
Hydrogen Ion Concentration Cell
Acid-Base Properties of Amino Acids
Electrical Conductivity of Liquids and Solutions
Instrumental Recording of a Titration Curve
A Visual Demonstration of Raoult’s Law
Vapor Pressure of Solutions: Raoult’s Law
Description: Video tape of different mole fractions of decane and diethyl ether being injected into mercury barometers. The drop in mercury level is related to the mole fraction of each of the components that make up solution.
This demonstration is also available on JCE “Chemistry Comes Alive!” Vol. 2 CD-Rom
Source: JCE software “Chemistry Comes Alive!”
Year: 1999 Vol: 76 Page: 1311
Keywords: Vapor pressure, Vapor pressure of solutions, Colligative Properties, Mixtures, Mole Fraction, Raoult’s Law
Rating: 
Hazard: Low
- Electric shock hazard
- Video or simulation
Effectiveness: Good
- Good connection from demo to course material
- Low failure rate
- Time to results is low
- Mild effects are seen by audience
- Observable with guidance
Difficulty: Low
- Examples involving models or simulations
- Simple procedures
Safety Precautions:
- Use of UL approved three-prong plug and outlet
- Eye protection required
Class: Video or Simulations, Properties of Solutions, Equilibrium, Vapor pressure
Division: General, Physical Chemistry
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