Explosive Decomposition of Nitrogen Triiodide
Volume Increase Upon Neutralization
Dissolution of a Binary Mixture
Shapes of Soap Films and Bubbles
Surface Spreading and Surface Tension
Surface Tension of Water: The Floating Paper Clip
Will a Tissue Hold Water? Interfacial Tension
Surface Tension: Floating Duck
Effect of Heating a Rubber Band and a Spring
Surface Tension With Oil and Pepper
Household Chemical Density Column
Evaporation as an Endothermic Process
Will a Tissue Hold Water? Interfacial Tension
Description: Scotchguard is sprayed on a piece of facial tissue and allowed to dry. Water is poured into the tissue, and the tissue holds the water. Water is poured onto another facial tissue that has not been treated, and the tissue breaks.
Source: Shakhashiri, B.Z. Chemical Demonstrations: A Handbook for Teachers of Chemistry
Year: 1989 Vol: 3 page: 305
Keywords: Scotchguard, Facial tissue, Water, Hydrophobicity
Rating: 
Hazard: Some
- Acute toxicity hazard
- Flammability hazard
- Specific organ toxicity-central nervous system
- Inhalation hazard
- Chemicals that produce flammable gases
Effectiveness: Good
- Results are clearly observable without guidance
- Good connection from demo to course material
- High reliability
- Systems contrast is noticeable
- Time to results is medium
- Primary effects
Difficulty: Some
- Simple procedures
- Some intermediate steps to results
- Careful manipulations required
- Prior training recommended
Safety Precautions:
- Eye protection required
- Gloves recommended
- Absorbent material on hand
- ABC fire extinguisher on hand
- Perform in a well-ventilated area
Class: Liquids and Solids, Intermolecular Forces, Thermodynamics
Division: General, Physical Chemistry, Material Science Chemistry
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