Atomic Emission Lab

Atomic Emission Lab - left unattended, and the gas should...

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Atomic Emission Spectra In this lab, we observed the colors emitted by certain known elements when they are excited in the flame of a Bunsen burner. We already knew that when a hydrogen atom is confronted with energy, the electron will absorb some of the energy, moving to a higher orbital. When it drops back to its original orbital, it releases energy in a wavelength that we are able to see. We observed six chemicals and recorded what colors were emitted when placed in the flame. Then, we were given an unknown substance. We placed it in the flame, recorded what color was expressed, and then were able to match it to a known chemical and color emission. We performed this experiment with a Bunsen burner. The flame should never be
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Unformatted text preview: left unattended, and the gas should be turned off when not in use. We also used seven chemicals. Potassium chloride, strontium chloride and calcium chloride have no health risks. However, sodium chloride is an irritant. Barium chloride is toxic by ingestion. Copper (II) chloride is toxic. Hydrochloric acid is toxic and corrosive. We observed that NaCl emitted a bright orange color. CaCl 2 was orange, KCl was light purple, SrCl 2 was red, BaCl 2 was yellow and CuCl 2 was green. We placed our unknown (Letter T) in the flame and observed that a red flame was produced. We determined our unknown to be SrCl 2 ....
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