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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