Chemiluminescent Ammonia Fountain
Crystallization from Supersaturated Solution 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 by Nonvolatile Solutes
Salting Out: Making Liquids Immiscible
Volume Increase Upon Neutralization
Dialysis of a Mixture
Description: Two colored solutions are mixed together and placed in dialysis tubing. When the dialysis bag is put in a large beaker of water, the dialysis membrane will allow only one of the colored solutions to dialyze into the water in the surrounding beaker, while the other remains in the dialysis bag.
Source: Kristin Johnson
Year: 1998 Vol: N/A Page: N/A
Keywords: Dialysis, Cutoff weight, Osmosis, Separation. Blue dextran
Rating: 
Hazard: Some
- Acute toxicity hazard – oral, dermal, inhalation
- Acute aquatic toxicity hazard
- Specific organ toxicity – repeated exposure – kidneys, liver
Effectiveness: Average
- Results are clearly observable without guidance
- Clear contrast of behavior of systems under observation
- Time to results is high
- Some connection from demo to course material
- Moderate failure rate
Difficulty: Some
- Simple manipulations for most to perform
- Simple procedures
- Demos in which display is used
- Handle dialysis bag with care
Safety Precautions:
- Eye protection required
- Gloves required
- Absorbent material on hand
- Use UL approved three-prong plug and outlet
- Prevent release of reagents to the environment
- Avoid exposure to droplets, mists, and vapors
Class: Chromatography, Osmosis, Properties of Solutions, Biochemistry
Division: General, Analytical Chemistry, Biological Chemistry
The demonstration Dialysis of a Solution may be found under Biochemistry- Dialysis of a Solution.
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