Aqueous Equilibrium and Precipitation Reactions- Common Ion Effect with Lead Iodide

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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