Common Ion Effect with Lead Iodide
Description: Lead nitrate and potassium iodide solutions are mixed to form a saturated solution of lead iodide. The solution is filtered. Solid lead nitrate or potassium iodide are added to the filtrate, and more precipitate forms in each case.
Source: UW Card Catalog
Year: N/A Vol: N/A Page: N/A
Keywords: Solubility products, Lead Nitrate, Potassium Iodide, Lead Iodide, Precipitate, Chemical equilibrium, LeChatelier’s Principle
Rating: 
Hazard: High
- Oxidizing solids
- Acute toxicity – oral
- Acute toxicity – inhalation
- Serious eye damage
- Reproductive toxicity
- Specific target organ toxicity – repeated exposure – central nervous system, thyroid
- Acute aquatic toxicity
- Chronic aquatic toxicity
Effectiveness: Good
- Good connection from demo to course material
- Low failure rate
- Time to results is low
- Experiment addresses preconceived notions
- Mild effects are seen by audience
Difficulty: Medium
- Sequential manipulations required to achieve results
- Procedures with some intermediate steps to results
- Use of scientific equipment
- Use of toxic reagents
Safety Precautions:
- Eye protection required
- Gloves required
- Avoid exposure to dusts, mists and droplets
- Absorbent materials on hand
- Perform on a chemically resistant surface
- Prevent release of reagents to the environment
Class: Aqueous Equilibrium and Precipitation Reactions
Division: General, Analytical Chemistry
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