Types of Chemical Reactions- Using Large Glass Cylinders to Demonstrate Precipitation Reactions

Using Large Glass Cylinders to Demonstrate Precipitation Reactions

Description: A precipitate is formed from two soluble salts in a large glass cylinder that is almost completely filled with one of the salt solutions. The other salt is dissolved in a funnel at the top of the cylinder. When the solutions meet at the funnel stem, a precipitate forms. This process can continue for almost an hour.

Source: Journal of Chemical Education

Year: 1999 Vol. 76 Page 528

Keywords: Precipitate, Salt, Funnel, Large

Rating:

Hazard: Some

• Acute toxicity hazard – oral, inhalation
• Aquatic toxicity hazard
• Carcinogenicity hazard
• Corrosive to metals
• Reproductive toxicity hazard
• Serious eye damage

Effectiveness: Average

• Results are observable without guidance
• Good connection from demo to course material
• Time to results is medium
• Good reliability
• Mild effects are seen by audience

Difficulty: Low

• Simple manipulations for most to perform
• Simple procedures
• Use of large glassware

Safety Precautions:

• Eye protection required
• Gloves required
• Absorbent materials on hand
• Avoid exposure to mists, droplets or solids

Class: Precipitation Reactions

Division: General

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