Absorption Spectroscopy

Absorption Spectroscopy - Ashbaugh 1 Beer's Law By Parker...

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Ashbaugh 1 Beer’s Law By: Parker Ashbaugh Partner: Bryan Redsun 8/27/07 TA: TJ Black Chem 104b Sec 09 Abstract: First the absorbance of a stock dye solution and its four dilutions were measured. The measurements were plotted on a linear graph. The slope of the best fit was used to analyze the molar absorptivity at the wavelength of maximal absorbance. After performing calculations using Beer's Law, based on the concentrations and absorbance’s, the molar absorptivity was found to be 3.7 x 10 4 (1/M * cm) for red #40 and 4.6 x 10 4 (1/M * cm) for red #3 at the highest wavelength.
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Ashbaugh 2 I. Introduction Absorption spectroscopy is the study of light absorbed by molecules. Molecular absorption occurs when an electron absorbs or gains a photon of light and moves up to a higher energy level. In this experiment, we will use absorption spectroscopy as a quantitative technique, use Beer's law, and make quantitative dilutions. The main goal for this experiment is to identify the molar absorptivity of a solution at its wavelength of maximal absorbance. In order to
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