SC CHEM 333 - Dehydration of Cyclohexanol to Cyclohexene Post-lab (4 pages)

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Dehydration of Cyclohexanol to Cyclohexene Post-lab



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Experiment 8 Dehydration of Cyclohexanol to Cyclohexene Post lab By Cameron Kahn TA James Collie 12 November 2013 Observations Initially the first observation was that the reagents were clear and colorless Upon heating the solution a strong smell was noted The presumed odor was from the cyclohexanol which was a faint camphor odor Before transferring the mixture to the separatory funnel the solution was observed to have a yellow hue After separating and washing the solution the next point of observation was during the qualitative tests for alkenes Four test tubes were set up two test tubes being controls while the other two would contain the final product In the controlled test tubes 1mL of cyclohexanol was added to each followed by either 10 drops of KMnO4 solution or 10 drops of bromine water solution In the test tube with KMnO4 and cyclohexanol the solution formed two layers one was purple in color The two layers formed because the KMnO4 did not react The other control test tube with the bromine water solution and cyclohexanol formed two layers as well one being yellow in color while the other was clear in color Upon the addition of 1 KMnO4 solution to the product test tube a brown precipitant formed The precipitant was Maganese Oxide Next the addition of the bromine water solution to the product formed two layers one layer was yellow in color while the second layer was clear in color Results The starting volume of the reagent cyclohexanol was measured to be 6 2mL From the reagent table the density was found to be 0 962g mL for cyclohexanol Using the density equals mass divided by volume equation one was able to rearrange to find the mass of cyclohexanol which was calculated to be 5 96g Next the mass of the product cyclohexene was calculated using the same density equation just rearranged to solve for mass The volume of cyclohexene was measured to be 1 0mL and from the reagent table the density was to be 0 811g mL From the density equation the mass of cyclohexene



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