Flame Test Lab Report, Lab Reports of Chemistry

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Flame Test Lab

Pre-AP

Mr. Drost

Pre-Lab Questions

1. What are the alkali metal elements? Where

are they located on the periodic table?

2. What are alkaline earth metal elements?

Where are they located on the periodic table?

Safety & Materials

• Safety

• Wear goggles
• Use caution when using the Bunsen Burner
• Tie back long hair & do not wear loose clothing - Materials - Bunsen Burners - Toothpicks presoaked in solutions - Chemical solutions: - Sodium chloride - Calcium chloride - Strontium chloride - Potassium chloride - Barium chloride - Copper chloride - Lithium chloride - Unknown

Procedure

1. Carefully light Bunsen Burner as instructed.

2. Grasp one presoaked toothpick with forceps.

3. Insert the chemically soaked toothpick into the

hottest part of the flame.

4. Observe the flame color during the first 5- 10

seconds of burning and record your

observations.

5. Discard the expended toothpick.

6. Repeat steps 2-4 at each station until complete.

Questions – Weave these in!

1. Describe what happens to the electrons in an element when the element is heated to high temperatures.

2. If we use a different solution with the same metal ion will the flame test results change? Why or why not?

3. Explain why the metal ions emit light of different colors when heated.

4. What are the pros and cons of using the flame tests to identify metal ions in solution?

5. List the flame colors you observed in order from highest wave energy to lowest wave energy.