H:18 Chemistry*
Data Table
Chemical Compounds:
|
Element Symbols:
|
Characteristics:
|
Barium Chloride
| BaCl2 | Normal flame color |
Calcium Chloride
| CaCl2 | Orange |
Lithium Chloride
| LiCl | Pink/violet |
Potassium Chloride
| KCl | Blue |
Sodium Chloride
| NaCl | Orange/Yellow |
Strontium Chloride
| SrCl2 | Red |
Unknown???
| Yellow | |
Dry Ice
| CO2 | Solid white substance |
Analysis Questions
1) The three indicators that determined chemical change was the color, size, and movement of the flames.
2) Something that is emitted when a chemical change takes place in the flame test is the color change.
3) The group of elements on the periodic table would be Alkali metal and Earth Alkali metals.
4) The only two elements that give the same spectrum of color would be Sodium Chloride and Potassium Chloride. They both gave off a yellow orange type of look.
5) The catalyst in the flame test experiment would be the heat, the flames.
6) One potential disadvantage would be the amount of time the color stays in the flame, so each person is forced to be alert. I would change the order in which we had to view the colors.
Critical Thinking
In a crime scene the flame test can be useful because the flame test can be used to determine metal elements inside of water. Also, when the water is vaporized the metals and what is on the metals occur. Therefore, someones' fingerprints can show on the metal that is being studied at the moment, during the flame. Also, it can confirm which type of metal was used and it will help determine which weapon contains a certain element and lead to suspect of the crime.
http://21008isabella-csi.blogspot.com/2011/08/flame-test.html
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