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 by Nonvolatile Solutes
Salting Out: Making Liquids Immiscible
Volume Increase Upon Neutralization
Osmotic Pressure of a Sugar Solution
Description: Concentrated sucrose solution is placed in a dialysis membrane bag attached to the bottom of a long vertical glass tube. The bag is immersed in water. The liquid level in the long glass tube slowly rises due to the increase in osmotic pressure.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 Page: 286
Keywords: Osmosis, Colligative properties, Sucrose, Concentration gradient, Osmotic pressure
Rating: 
Hazard: Low
- No use of toxic chemicals required
- Spill hazard
Effectiveness: Good
- Good connection from demo to course material
- Results are observable without guidance
- Time to results is high
- Moderate reliability
- Singular example of this effect
Difficulty: Medium
- Careful manipulations required
- Procedures with some intermediate steps to results
Safety Precautions:
- Gloves recommended
- Eye protection required
- Absorbent material on hand
Class: Intermolecular Forces, Properties of Solutions, Equilibrium of Chemical Systems
Division: General, Physical Chemistry
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