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Gas Chromatography Lab

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Distillation and Gas Chromatography Goal: The goal of today’s experiment is to collect three different fractions for each distillation by separating two different volatile solutions. Once the fractions are collected, we will record the boiling point range and perform a gas chromatography an original mixture along with the three different fractions that were collected.

Significance: This lab is very important if someone needs to separate two different volatile solutions. They can do the simple and fractional distillation, and then using the gas chromatography and compare with other people. This lab basically just teaches you how to separate solutions. During the separation process, there are some factors that must be taken in account, such as: vapor pressure, how polar is our compound, what our temperature for the column is and how long the column is. 1 Theory:
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Vapor pressure can be defined as the pressure exerted by a vapor in equilibrium with the solid or liquid phase of the same substance. Dalton’s Law states the total pressure is equal to the partial pressures of each component in the gas phase. Finally Raoult’s Law is where the vapor pressure (Px) depends on the mole fraction (Nx) of each component. 2 For Gas Chromatography, a mobile and its stationary phase are required. The mobile phase which is the carrier gas is comprised of an inert gas i.e., helium, argon, or nitrogen. The stationary phase consists of a packed column in which the packing or solid support itself acts as stationary phase, or is coated with the liquid stationary phase

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