- To observe the different colors emitted by ions in a flame test.
- Barium Nitrate
- Calcium Nitrate
- Lithium Nitrate
- Potassium Nitrate
- Sodium Nitrate
- Strontium Nitrate
- Copper Sulfate
- Methyl Alcohol
- 7 Watch Glasses
- Mortar & Pestle
- Powder the salts in the mortar, cleaning it out between salts.
- Put salt 1 in watchglass 1, salt 2 in watchglass 2, and so on.
- Pour 5 mL of methyl alcohol in each watchglass.
- Using a match, carefully ignite the alcohol in watchglass1.
- After the alcohol level nears the salt, record the color of the flame.
- Repeat steps 4 and 5 for all the salts in watchglasses 2-7.
Data and Information
||Formula of Salt
||Color of Flame
- What kind of colors are emitted by the ions?
- Does the alcohol change the color of the flame? Why, or why not?
- Can a flame be used to identify a metal ion? Why, or why not?