Chromatography of Spinach Extract
Extraction of Metals With Dithizone
Partitioning of Iodine in Solution
Computer Simulation of Mass Spectroscopy
Magic Sand Models Hydrophobic Effect
Reverse Phase Separation of Dyes
Water Softening- Hard and Soft Water With Soap
Water Softening – Hard and Soft Water with Soap
Description: Samples of hard and distilled water are shaken with soap, and amount of suds noted. A sample of hard water is poured through an ion exchange resin and again tested. This water behaves much as distilled water with lots of suds being produced.
Source: UW Card Catalog
Year: N/A Vol: N/A Page; N/A
Keywords: Cation exchange resin, Dowex, Distilled water, Ion exchange, Suds
Rating: 
Hazard: Low
- Eye irritation
Effectiveness: Good
- Results are clearly observable without guidance
- Low failure rate
- Good connection from demo to course material
- Time to results is medium
Difficulty: Medium
- Some sequential or concerted manipulations
- Procedures with intermediate steps to results
- Use of scientific glassware
Safety Precautions:
- Eye protection required
- Gloves recommended
- Absorbent material on hand
Class: Properties of Solutions, Solubility, Physical Chemistry, Ion Exchange
Division: General, Analytical Chemistry
Return to Analytical Chemistry Demonstrations