kool_aid_lab_082345 - Quantitative Analysis of Kool-Aid...

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Quantitative Analysis of Kool-Aid using Absorption Spectroscopy Colored solutions have interested chemists for a long time. Of particular interest has been the fact that colored solutions, when irradiated with white light, will selectively absorb incident light of some wavelengths but not of others. This is very useful for forensic and industrial procedures because it is non-destructive to the sample and does not alter it in any way. Visible spectroscopy requires only shining light on the sample and causes no changes to the solution. We can determine the particular wavelength or group of wavelengths absorbed by exposing a sample to monochromatic light of different wavelengths and recording the response. If light of a particular wavelength is passed through a sample and does not reach the detector, we will see that the intensity of the transmitted light (I) is significantly less than the intensity of the light incident on the sample (I 0 ). The % transmittance is then defined as the percent of the incident light that passes through the sample such that %T = (I/I 0 ) × 100%.
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This note was uploaded on 03/29/2011 for the course ECON 101 taught by Professor Df during the Spring '11 term at American Intl. University.

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kool_aid_lab_082345 - Quantitative Analysis of Kool-Aid...

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