exp5 - INTRODUCTION Objective The main objectives of this...

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INTRODUCTION Objective: The main objectives of this experiment are as follow: 1. To calculate the thickness of the empty cell. 2. To calculate the thickness of the polystyrene cell. 3. To calculate the concentration of isopropanol in the unknown sample. Theory: The infrared absorption spectrum was used to analyze a given mixture. The use of infrared radiation has an important analytical application in the quantitative and qualitative analysis of organic compounds and mixture. Different molecules have different IR absorption and as a result different spectra, depending on the structure and mass of the component atom. However, by matching the absorption spectra of unknown samples with the characteristic absorption frequencies or wavelengths of different functional groups, to identify the samples. In addition to identification of molecules or its functional groups, it is possible to acquire information about its geometry by analyzing its IR spectra.
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