# Experiment

In: Other Topics

Submitted By morrisali
Words 528
Pages 3
10th October 2012
Organic chemistry lab Thursday 8 am

Separation of Hexane and Toluene

Abstract

The purpose of this lab was to separate hexane and toluene using the process of simple distillation. This was collected 3times each at different temperature and after collecting each distillate the refractive index was found of the distillate.

Procedure

The procedure is the same as Dr. Kelley provided and there were no changes made to it.

Data | Fractional index | Temperature | First distillation | 1.3820 | 670c | Second distillation | 1.4656 | 1000c | Third distillation | 1.4851 | 1070c |

Calculations

X (1.3745) + (1-X) (1.4966) = nD
This equation is for the volume fraction of X and the measured refractive index is nD. Found from the sheet of “simple distillation: separation of hexane and toluene”

First distillate

X (1.3745) + (1-X)(1.4966) = 1.3820
1.3745X - 1.4966X + 1.4966 = 1.3820
-0.1221X = -0.1146
X = 0.9386
1 – X = 0.0614

Volume fraction of Hexane = (X) * 100 = %
=0.9386 * 100 = 93.86%

Volume fraction of Toluene = (1- X) * 100 = %
=0.0614 * 100 = 6.14%
Second distillation

X (1.3745) + (1-X)(1.4966) = 1.4656
1.3745X - 1.4966X + 1.4966 = 1.4656
-0.1221X = -0.031
X = 0.2539
1-X = 0.7461

Volume fraction of hexane = (X) * 100 = %
0.2539 * 100 = 25.39%

Volume fraction of toluene = (1- X) * 100 = % 0.7461 * 100 = 74.61%

Final distillation

X(1.3745) + (1-X)(1.4966) = 1.4851
1.3745X - 1.4966X + 1.4966 = 1.4851
-0.1221X = -0.0115
X= 0.0942
1 – X = 0.9058

Volume fraction of hexane = (X) * 100 = % 0.0942 * 100 = 9.42%

Volume fraction of toluene = (1- X) * 100 = % 0.9058 * 100 = 90.58%

| Hexane % and Toluene % | Volume fraction of hexane and Toluene in first distillation | Hexane = 93.86%Toluene = 6.14% | Volume fraction of hexane and Toluene in second distillation | Hexane...

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