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
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