1. Exp. 8.6 Flame Test of Some Elements

2. Critical question:
How can a flame test be used to identify the elements in a compound?.
Procedure:
Add small quantities of different compounds on the loop of a nichrome wire and hold it over a flame. Be careful to rinse wire and change beaker water between samples.

3. Data Compound Formula Description of flame Potassium Chloride
Copper(II) Chloride
Lithium Nitrate
Barium Nitrate
Calcium Chloride

4. Copper(II)
Sulfate
Copper (II) Nitrate
Calcium Nitrate
Strontium Nitrate
Potassium Nitrate
Sodium Nitrate

5. Compound
Formula
Description of Flame
Potassium Sulfate
____________
Lithium Chloride

6. Conclusion:

7. Questions
How could you recognize sodium in a compound by doing such a flame test?
How could you recognize copper?
When you hold a small amount of sodium chloride in a flame, you observe that the flame is right yellow. What could you do to be sure that the color is due to sodium and not chlorine?
When you spill a few drops of soup or milk on a pale- blue gas flame when cooking, the flame changes to a mixture of colors. Yellow is the most intense color. What do you conclude about this observation?