Chemiluminescent Ammonia Fountain
Crystallization from Supersaturated Solutions of Sodium Acetate
Density and Miscibility of Liquids
Electrical Conductivity of Liquids and Solutions
Osmotic Pressure of a Sugar Solution
Vapor Pressure of Solutions: Raoult’s Law
A Visual Demonstration of Raoult’s Law
Water Softening – Hard and Soft Water With Soap
Clean Air With the Cottrell Precipitator
Color of Sunset: The Tyndall Effect
Getting Colder: Freezing Point Depression
Getting Hotter: Boiling Point Elevation of Nonvolatile Solutes
Salting Out: Making Liquids Immiscible
Volume Increase Upon Neutralization
Shapes of Soap Films and Bubbles
Description: The form of soap films on variously shaped wire forms is examined
Source: Shakahashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 381
Keywords: Soap bubbles, Film shapes, Surface tension, Viscosity
Rating: 
Hazard: Low
- No toxic reagents or mixtures in use
Effectiveness: Good
- Clear contrast between behavior of systems
- Low failure rate
- Clearly observable without guidance
- Time to results is low
- Some connection from demo to course material
Difficulty: Low
- Simple procedures
- Simple manipulations for most to perform
- Demos do not involve deep attention
Safety Precautions:
- Eye protection required
- Absorbent materials on hand
- Gloves recommended
Class: Properties and Solutions, Surface Tension, Thermodynamics
Division: General, Physical Chemistry
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