Lab 3 - M. Farrell Matt Farrell October 2, 2006 Lab 3:...

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M. Farrell Matt Farrell October 2, 2006 Lab 3: Distillation and Gas Chromatography Purpose: The purpose of the lab is to be proficient in distilling chemical compounds; such as toluene and cyclohexane. After distillation is performed, then running a gas chromatographer is the next process. Using the distilled solutions, one is to inject the solution into a GC and record the readings the machine gives. This will then allow us to understand the peaks that the graph gives. Background: Distillation is when a liquid is continued to be heating turning the liquid into vapor, and then cooling the vapor back into liquid again. Fractional distillation is used when there are two or more liquids involved with different boiling points. Raoult’s Law is used to describe the relationship between the vapor pressure of a solution, the mole fraction of the solute, and the vapor pressure of the solute. Gas chromatography is composed of two parts. The mobile phase is the stream of inert gas. The stationary phase is a liquid film supported on a solid and packed in a heated glass. The sample is then injected, separation occurs, components pass detector, and the recorder gives off a signal. Raoult’s law is used to help determine pressure of a solution. The equation for Raoult’s Law is: P solution = (P 1 ) pureX1 + (P 2 ) pureX2 .
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Lab 3 - M. Farrell Matt Farrell October 2, 2006 Lab 3:...

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