Flame Test Experiment
Objective: Describe the difference between a physical and chemical change.
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Chemical Change |
 |
Physical Change |
Date Table:
Chemical Compound
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Elements Involved
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Characteristics
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Barium Chloride
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Barium
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It turned green
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Calcium Chloride
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Calcium
|
It turned orange
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Lithium Chloride
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Lithium
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It turned hot pink
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Potassium Chloride
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Potassium
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It turned violet
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Sodium Chloride
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Sodium (Salt water)
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It turned bright orange
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Strontium Chloride
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Strontium
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It turned a scarlet color
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Aluminum Foil?
| It sparkles | |
Unknown
| Barium, Lithium |
It turned pink and green
|
Analysis Questions:
1. What characteristics determine that a chemical change (or reaction) has occurred?
The characteristics that determine that a chemical change has occurred is burning, decomposing, rotting
2. What is emitted when a chemical change takes place in the flame test experiment?
The color is what was emitted when the chemical change takes place in the flame test experiment.
3. What group, from the periodic table, do these elements exist?
These elements exists under the "Alkali Earth" and "Alkaline Earth" group.
4. Do any two colors give the same spectrum of color? Explain why?
No, any two colors do not give the same spectrum of color because every element is different from another. Every element is not the same, every element contains different things from another element.
5. Recall what a catalyst is in a chemical reaction. What was the catalyst in these reactions?
The catalyst was the elements that were put in the reactions. For the product, we received different colors.
Critical Thinking:
In your blog, explain how the data gathered in this lab can help solve crimes or convict criminals. Research the topic and use what you discovered in class to write 1-2 paragraphs on answering question. LINK
Data in this lab can help solve crimes because for example, if detectives are investigating a crime a gun shot scene, they take the and test the gunshot residue from the suspect, like the clothes, and look for THREE elements: barium, lead, and antimony. When they go and test to see if the evidence comes out positive for all the three elements and if the particles have the right shape, the detectives come to the conclusion that their suspect has either fired a weapon, had a weapon in their hand that has recently been fired, or was near the weapon the time it was fired. If the weapon has never been found from the scene, the detective has no way of testing the residue to put the ammo and the suspect together.
Video of Flame Test Experiment
