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What is the identity of your unknown?What color did the unknown exhibit that led you to your conclusion? 

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What is the identity of your unknown?What color did the unknown exhibit that led you to your conclusion? 

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The identity of our unknown E was Sodium+(Na+). The color of our unknown was redish orange. Then we found out it was NA+.

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1. Label the test tubes with the ions to be

tested in the experiment the label tape or masking tape.

If the test tubes are labeled already, place the corresponding solutions into each of the test tubes.

2. Obtain some popsicle sticks or coffee stirrers and place one in each test tube to soak for 1 minute.

3. Light the Bunsen burner. Adjust the flame to get a favorable air and gas mixture. Remember that

the hottest part of the flame is on the tip of the inside cone.

4. Place the wet end of the wooden stick directly into the hottest part of the flame. Observe the

FIRST COLOR YOU SEE as the liquid vaporizes.

5. Describe the color you see the best you can. Use the table on page 92 of the Holt text or the

color wheel to determine the wavelength of light you see emitted by the metal ion solution.

Record this information on your lab report.

6. Dispose of the burnt sticks into the metal can provided. Make sure that the sticks are out by

burying them in the sand.

7. Repeat steps 4-6 for each solution. Remember: Make good descriptions of each color, as some

may look similar.

8. Obtain an unknown from the instructor. Repeat steps 4-6 for the unknown. Use your data to

determine what the unknown ion is.

9. When done taking observations, clean each test tube with soap and water. Dry the outside

10. of the test tubes and place them in the rack for the next period. Return the burners and chemicals where you got them.

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Which ESLR was adressed in this activity?

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Which ESLR was adressed in this activity?

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We think the ESLR that was adressed in this acitvity was the Critical Thinkers for many reasons. First of all, we synthesize our information from the experiment when we lit the chemicals on fire. We also used our educated guesses on what color the fire is, and what element our unknown is. We also made some well-informed choices by doing our experiment safely. That's why we think the Critical Thinkers was our ESLR in this activity.

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Materials

Bunsen burner

7 test tubes

label tape or masking tape

coffee stirrers or popsicle sticks

Test tube rack

Matches

Flashlight (if needed)

Page 92 of textbook (visible spectrum) or color wheel with wavelengths

Safety goggles
Lab apron or coat

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We determine our unknown by identifing all the elements before and

then figuring out the unknown from the known elements

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Each elements created different colors when they were combined with

the flames.

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The phenonenon happens due to the colors and types of atoms emitting light

of different wavelengths when electrons in those atoms are moved.

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We are doing a Flame Test on which element makes which color.

The purpose of the lab is to observe the characteristic

colors produced by certain metallic ions when vaporized in a flame. The identification

of an unknown will also be performed by means of its own flame test.