Aqueous Equilibrium and Precipitation Reactions- Precipitating Silver With Chromate and Chloride Ions

Precipitating Silver with Chromate and Chloride Ions

Description: When silver nitrate is added to a mixture of chromate and chloride ions, red silver chromate forms and then quickly disappears as silver chloride predominates. Only when all chloride is gone does red precipitate persist.

Source: UW Card Catalog

Year: N/A   Vol: N/A   Page: N/A

Keywords: Selective precipitation, Silver nitrate, Chromate, Chloride, Equilibrium

Rating:

Hazard: High

• Acute toxicity hazard – oral, inhalation, dermal
• Oxidizer
• Reproductive toxicity hazard
• Skin corrosion hazard
• Serious eye damage
• Germ cell mutagenicity hazard
• Aquatic toxicity hazard
• Carcinogenicity hazard
• Skin sensitization
• Respiratory sensitization

Effectiveness: Good

• Good connection from demo to course material
• Low failure rate
• Results are observable with guidance
• Time to result is low
• Mild effects are observed

Difficulty: Medium

• Adding reagents in concert
• Procedures with some intermediate steps to results
• Simple manipulations for most to perform
• Use of toxic reagents

Safety Precautions:

• Eye protection required
• Gloves required
• Absorbent materials on hand
• Avoid exposure to dusts, mists or vapors
• Perform in a well ventilated area
• Perform on a chemically resistant surface
• Prevent release of reagents to the environment

Class: Aqueous Equilibrium and Precipitation Reactions, Dissociation and Solubility

Division: General, Analytical Chemistry

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