AnswersEO Night School Chemistry 7320ALab: Flame Test

Lab: Flame Test Answers

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In this assignment, you will answer questions about the laboratory experiment.What is the main reason scientists use the flame test?

A
to determine the amount of metal ion present in a sample
B
to determine the molecular mass of a metal ion present in a sample
C
to make colorful fireworks
D
to identify metal ions in samples
2
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What was the main purpose of the HCl in the experiment?

A
to observe the color of the flame
B
to react with the other solutions
C
to clean the wire before testing a new solution
D
to light the Bunsen burner
3

ABC✔ D

A
A
B
B
C
C
D
✔ D
4

Choose the statement that does not indicate proper safety procedures.

A
Always wear a lab coat and safety goggles while performing an experiment.
B
Use caution around the flame as nearby items can ignite.
C
Tie back long hair and secure any loose clothing before approaching a flame.
D
Use the largest Bunsen burner flame possible.
E
Use chemical resistant gloves when handling chemicals.
F
Report all accidents to your teacher.
G
Keep your work area clear during the experiment.
5

What is the most likely metal ion present in the fireworks shown in the image?

A
calcium
B
sodium
C
barium
D
lithium
E
copper
F
cesium
6

In the streetlight shown in the image to the right, the light that is given off is a bright orange-yellow. The color could result from the presence of calcium✔ sodiumlithium metal ion in the bulb.

A
calcium
B
✔ sodium
C
lithium
7

Imagine that you wanted to create a lamp that produces a blue color. You could make a metal-halide lamp out of sodiumlithium✔ cesium.

A
sodium
B
lithium
C
✔ cesium

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