Balloon Full of Carbon Dioxide
Effect of Pressure on Melting Point of Ice
The Liquid Phase of Carbon Dioxide
Vapor Pressure of Pure Liquids
Boiling Acetone at Reduced Pressure
Magic Sand Models the Hydrophobic Effect
Surface Tension: Floating Duck
Surface Tension of Water: The Floating Paper Clip
Will Tissue Hold Water? Interfacial Tension
Computer NaCl Crystal Cleavage
Variation of Volume of Water With Temperature
Surface Spreading and Surface Tension
Gel Formation with Sodium Alginate and Calcium Chloride
Boiling Acetone or Water at Room Temperature
Density of Sulfur Hexafluoride and Sublimation of Certain Gases
Magic Sand Models the Hydrophobic Effect
Description: This sand is specially coated with a hydrophobic material, and it is not wetted by water. Its appearance in water is compared to that of regular sand. Magic sand is wetted by methanol.
Source: Journal of Chemical Education
Year: 1990 Vol: 67 Page: 512
Keywords: Magic sand, Hydrophobic, Methanol, Water, Methyl siloxane
Rating: 
Hazard: Low
- Breakage hazard
Effectiveness: Good
- Clearly observable with guidance
- High reliability
- Good connection from demo to course material
- Time to results is low
- Contrast between systems is obvious
Difficulty: Medium
- Simple manipulations for most to perform
- Demos in which a display is used
- Simple procedures
- Some sequential manipulations required
Safety Precautions:
- Eye protection required
- Absorbent material on hand
Class: Intermolecular Forces, Physical Properties
Division: General, Analytical Chemistry
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