Flame Test Analysis Worksheet
A Grade 9 Science worksheet on flame tests, covering the principles, procedures, and common observations for identifying metal ions.
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Flame Test Analysis
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Read each question carefully and provide your best answer. For multiple choice questions, circle the letter corresponding to the correct answer. For fill-in-the-blanks, write your answer in the space provided. For short answer questions, use complete sentences.
1. What causes the different colors observed in a flame test?
The temperature of the flame.
The type of fuel used in the burner.
Electrons moving between energy levels.
The amount of oxygen in the air.
2. Which metal ion typically produces a bright yellow flame?
Lithium
Sodium
Potassium
Calcium
3. In a flame test, the metal ions emit light when their excited fall back to lower energy levels.
4. A platinum or nichrome wire is often used in flame tests because it is and does not interfere with the color produced.
5. Briefly explain the purpose of cleaning the wire loop with hydrochloric acid before each flame test.
6. Describe the general procedure for conducting a flame test in a laboratory setting.
Match each metal ion with its characteristic flame test color.
7. Lithium
a. Lilac
8. Potassium
b. Red/Crimson
9. Copper
c. Orange-Red
10. Calcium
d. Blue-Green