Chem Lab 3

Chem Lab 3 - Mike Geddes CHEM 131L 112 Lab #3 Atomic Line...

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Mike Geddes CHEM 131L – 112 Lab #3 – Atomic Line Spectra The purpose of this lab was to learn how to calibrate a spectrometer and to determine the identity of an unknown substance using the visible wavelengths in the spectrometer. The strongest emission lines of the helium and mercury were recorded along with their respective wavelengths with and without the spectrometer. By matching the strongest lines with the wavelengths from the ruler mark, a calibration curve of ruler mark vs. wavelength was plotted. To find the unknown sample, small amounts of sodium chloride, copper (II) chloride, lithium chloride, and strontium chloride, were flame tested. The flames were looked at through spectrometers in order to see the colors emitted on the bright line spectra and the wavelengths were marked on a ruler. Because we recorded ruler marks and colors each chloride, the unknown substances identity was able to be established because of similar wavelength patterns. Examples of the bright line spectrum are all around us in nature and our everyday lives.
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This note was uploaded on 04/09/2008 for the course CHEM 132L taught by Professor Pavel during the Fall '07 term at Marist.

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Chem Lab 3 - Mike Geddes CHEM 131L 112 Lab #3 Atomic Line...

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