Hydration of Cu (II) Ion
Description: Solid cupric bromide dissolved in alcohol is brown. Adding water to this solution produces a blue-green color.
Source: Summerlin, L.R. and Ealy, J.L. Chemical Demonstrations: A Sourcebook for Teachers; 2nd Edition
Year: 1985 Vol: 1 Page: 44
Keywords: Bromide, Alcohol, Blue-green, Brown
Rating: 
Hazard: Medium
- Acute toxicity hazard
- Inhalation hazard
- Aquatic toxicity hazard
- Flammability hazard
- Eye damage hazard
Effectiveness: Average
- Somewhat connected to course material
- Results are observable without guidance
- Mild effects are seen by audience
- High reliability
- Time to results is low
Difficulty: Medium
- Some intermediate steps to result
- Use of toxic reagents
- Use of organic reagents
- Some sequential manipulations
Safety Precautions:
- Eye protection
- Gloves required
- Perform in a well-ventilated area
- ABC fire extinguisher on hand
- Absorbent materials on hand
- Avoid contact with liquid
- Prevent release of reagents to the environment
Class: Transition Metals, Coordination Compounds
Division: General, Inorganic Chemistry
Return to Inorganic Chemistry Demonstrations