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
Reverse Solubility
Description: Lead iodide is soluble in hot water but forms a precipitate when the container is placed into ice water. Calcium butyrate precipitates in hot water and re-dissolves when placed in cold water.
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Negative solubility coefficient, Solubility, Temperature
Rating: 
Hazard: Some
- Sealed vessels or glassware containing possible harmful chemicals
- Burn /scald hazard
- Electric shock hazard
Effectiveness: Average
- Results are observable with guidance
- Mild effects are seen by audience
- Time to results is medium
- High reliability
- Demo somewhat connected to course material
Difficulty: Medium
- Some intermediate steps to results
- Simple manipulations for most to perform
- Demos do not involve deep attention
- Demos at non-standard conditions
Safety Precautions:
- Eye protection is required
- Gloves are recommended
- Absorbent materials on hand
- Use UL approved three-prong plug and outlet
- Thermal gloves recommended
- Absorbent materials on hand
Class: Properties of Solutions, Thermodynamics, Solubility
Division: General
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