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Chem Lab Report 2

Chem Lab Report 2 - Austin Thai Chem 1A GSI Alvin Lin Sec...

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Austin Thai Chem 1A GSI Alvin Lin, Sec. 820 November 19, 2009 Abstract In the Light Inquiry lab, we are searching for the concentration of dye within Kool-Aid by using Beer’s Law to calculate the extinction coefficient of many food dyes to identify the dyes used in Kool-Aid and their concentrations as well. By identifying the dyes and their concentrations with the absorbance and wavelength data noticed in each of these dyes, we can calculate the peaks out of all the dyes and then solve for the concentration and dyes. From the experiment, we found the extinction coefficients and data of the concentration of Kool-Aid, which will be shown through the plots data and in the Results section. Introduction Solving for the concentration of the dye(s) in Kool-Aid is the main objective of the experiment. To solve for it, it requires the wavelength, absorbance, and concentration of the dyes that have the highest peak when encountered with light. During the experiment, spectroscopy is used and a spectrometer was used for dyes to determine which ones held the highest amount of absorbance in that particular solution. In detail, by solving for concentration and absorbance of the Kool-Aid dye and identifying it, we can measure the change in intensity of the sample of material that is absorbed and directly in
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correlation to the number of particles in the path of a ray of light. With this experiment, we can find out how in general a molecule or atom absorbs a single photon of light when an electron makes a transition to a higher energy orbital. To show the data that we got, graphs are necessary to show the absorbance growth and change as concentrations of certain dyes increase as well. It is interesting to note that absorbance is nearly impossible
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Chem Lab Report 2 - Austin Thai Chem 1A GSI Alvin Lin Sec...

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