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Unformatted text preview: Experiment #2: Distillation CHEM 213 Fall 2009 Distillation is an inexpensive and relatively simple technique used to purify liquids. Chemists often use this method to separate homogeneous solutions of two or more liquids. In industry, distillation is used to separate the economically important components of fossil fuels including natural gas, gasoline, kerosene, heating oil, and lubricants. In the food industry, distillation is used to concentrate the alcohol in wines and other beverages obtained from the natural fermentation of fruits and vegetables. Both of these economically important processes separate liquids, which do not interact with one another, by differences in their boiling points. In practice, liquids can be separated by simple or fractional distillation as discussed in Mohrig. In this experiment, you will be using two distillation methods to separate an alcohol from an organic solvent. Using either the blue or white glassware kits, you should separate the 60-mL unknown sample with both simple (figure 11.6) and fractional macroscale distillation (figure 11.15.) You and a partner will be randomly assigned one unknown alcohol/solvent mixture to purify by both methods. On the following two pages the apparatus for each distillation is represented. After comparing the quality of the two methods by constructing a distillation curve and analyzing the purified liquids by gas chromatography (GC), you will identify the pure alcohol from boiling point data, refractive index (RI) and infrared spectra (IR).data, refractive index (RI) and infrared spectra (IR)....
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- Spring '08