Experiment
3
The
Stoichiometry and Reactions of Some Copper Compounds
SAFETY
PRECAUTIONS FOR EXPERIMENT 3
-
Wear safety goggles. The reaction of Cu with HNO3 produces NO2, a very toxic gas.
-
This reaction must be carried out under the hood.
The reaction of Cu turnings with HNO3 is a vigorous reaction. Add the HNO3 carefully and cover the beaker with a watch glass.
Care should be exercised when using acids and bases. HNO3 can cause severe burns. HNO3 is not only a strong acid but it is also a strong oxidizing agent. This property is the basis for the xanthoproteic reaction where the majority of proteins, such as skin, react with HNO3 to give a yellow color. This yellow color will not wash off! Flush with water immediately if acid or base is spilled on the skin. Notify your instructor of any accidents.
Light the Bunsen burner under the hood so that unburned gas will be carried away by the hood fan. Make sure there are no flammable substances such as acetone in your area before you light your Bunsen burner.
Acetone is flammable. Extinguish all flames before obtaining or using acetone.
Always wash your hands before leaving the laboratory.
REVIEW GENERAL SAFETY GUIDELINES
| 1. | Safety |
|
2.
|
Objectives/Overview |
|
3.
|
Procedures |
| 4. | Observations |
|
5.
|
Copper Reaction Cycle |
| 6. | |
| 7. | Waste Disposal/Clean-up |
| 8. | |
| 9. | Conclusions |
| 10. | Grading Scale |
| 11. | Review Prelab Questions |
|
12.
|
Review Postlab Questions |
