Lab 7: Flame Test
The main purpose of this experiment was to emphasize the concept that different chemicals or elements will emit different wavelengths when they are in excited states. These wavelengths on the visible spectrum are colors. The other purpose was to identify the two unknown substances based on the color they emitted when they were in an excited state. The setup of the lab was simple. We were provided a Bunsen burner to burn the compounds and sticks soaked with the different compounds. We held the stick above the lit Bunsen burner and watched as the compounds emitted different colors.
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| Lithium Chloride, one of the unknown substances, burning a magenta color |
#2. Potassium Chloride
How we know: We can be sure that the two unknown substances are Lithium Chloride and Potassium Chloride because each each compound will emit a different wavelength when its electrons are in an excited state. The different emitted wavelengths correspond to a color that will be unique to that certain compound. For this reason, we can be sure that the compounds are correctly identified.
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