Main Group Elements- Water Softening – Hard and Soft Water With Soap

Water Softening- Hard and Soft Water with Soap

Description: Soap is added to a sample of tap water, and it does not produce suds when shaken. Another sample of tap water is passed through an ion exchange column. Soap is added to the second sample, and it produces lots of suds since the calcium ions have been removed.

Source: Journal of Chemical Education Vol. 53

Year: 1976   Vol: 53   Page: 302

Rating:

Keywords: Soap, Ion exchange column, Hardness, Suds

Hazard: Low

• Eye irritation

Effectiveness: Good

• Results are clearly observable without guidance
• Good connection from demo to course material
• Good reliability

Difficulty: Medium

• Procedures with some intermediate steps to results
• Use of laboratory equipment
• Some sequential manipulations

Safety Precautions:

• Eye protection required
• Gloves recommended
• Absorbent materials on hand

Class: Main Group Elements

Division: General

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