Lab 3 - Simple verses Fractional Distillation Experiment #3...

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Simple verses Fractional Distillation Experiment #3 Dan Guerra Section: 6 9/29/11
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Purpose : To learn the methods simple and fractional distillation, then to apply those methods to separate cyclohexane and toluene. Results and Discussion: Simple Distillation Simple Distillation 0 20 40 60 80 100 120 1 3 5 7 9 11 13 15 17 19 21 23 25 Volume colleceted (2x) From Organic Chemistry Laboratory, it is noted that simple distillation is used to separate substances that having a melting point difference of 70˚C and more. Based on Figure 1 on page 47 in Organic Chemistry Laboratory, the expected graph for the temperature behavior of simple distillation for a two-component mixture with a boiling point difference of less than 70˚C, should be a short plateau at low temperature, followed by a steady slope (as the remaining first compound is distilled off while the second compound begins to distil) and then another short plateau at a higher temperature; the two plateaus signifying the separation of the compounds. From our results, it is clear that the data collected from the simple distillation did not correspond to our expectation. The
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difference between the two compounds, toluene and cyclohexane is less than 70˚C. Our graph for the temperature behavior of this mixture however, did not exactly match up to
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Lab 3 - Simple verses Fractional Distillation Experiment #3...

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