Fractional Distillation And Gc

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Fractional Distillation and its comparison to a control simple distillation was the main focus of this lab. The theory behind fractional distillation is fundamentally the separation of compounds. In this experiment we used cyclohexane and toluene as our compounds. Fractional distillation is used when the boiling points of two compounds are within close range to each other. Toluene and cyclohexane have a boiling point difference of 30 degrees Celsius. The norm for performing a fractional distillation over simple distillation is if the boiling point values are within 25 degrees Celsius from each other. In theory a fractional distillation will give more accurate results since they are relatively near each other. The actual reaction was fairly straight forward with the distillation of the mixture solution followed by a gas chromatography of the 16th and 31st mL for analysis allowing us to find the amount of cyclohexane versus toluene in those samples. The success of this experiment was dependent largely on how well the apparatus was setup to ensure proper distillation of the solution. If the separate parts of the apparatus weren’t put together well is can case loss of solution through evaporation. The apparatus should also have no water in it since the presence of water can alter the intended results. The electrical attraction between water molecules causes dipole pulls which make t difficult to separate the molecules that move closer together. This raises the boiling point. After my apparatus was setup and distillation was begun water had condensates on the top of the fractionating column. This is to be noted since it can slightly affect the boiling point. As the distillation proceeded it was found that my distillation was occurring fairly slowly compared to other students. This issue was resolved with the addition of tin foil around the fractionating column and

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