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Distillation of a Binary Mixture

Distillation of a Binary Mixture - 1013 3804 Distillation...

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1013 3804 Distillation of a Binary Mixture Hexane Toluene C 6 H 14 C 7 H 8 Mol. Wt.: 86.18 Mol. Wt.: 92.14 1.3749 n D 1.4963 n D 69 o C 110.6 o C Abstract: A simple distillation and a fractional distillation were both conducted to separate a 1:1 mixture of hexane and toluene. Three fractions were collected for each distillation. Ultramicro-boiling point and refractive index analysis were conducted to ascertain the purity of each fraction. Fraction I contained an impure mixture of hexane, and fraction III contained a relatively purer mixture of toluene. New techniques: Distillations consist of separating two liquids based on their boiling points. The mixture is heated in a flask at the base of the apparatus causing the molecules to vaporize. The heated molecules rise, and then condense into a liquid traveling down a condensing tube surrounded by cold water. As the temperature increases each compound or fraction of the mixture vaporize throughout a temperature range. The major difference between a fractional and a simple distillation is the length of the initial column of the apparatus. The column in a fractional distillation column is much longer allowing greater separation between the substances.
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