A gas chromatography, with nitrogen gas as the carrier gas and a flame ionization detector, was used to separate and characterize the components of the essential oil. The retention times, peak areas, and peak heights were obtained for qualitative and quantitative analysis. A percentage of 0.
Report for the Simple and Fractional Distillation Experiment The Simple and Fractional Distillation experiment is conducted to compare the efficiencies of simple and fractional distillations in separating ethyl acetate and butyl acetate in a mixture of the two compounds.
The mole percent of each component is to be estimated from graphs of distillate volume vs. In a separate experiment, you will check the results of your analysis by gas chromatography. The report consists of three parts: Be sure to read the instructions in the lab manual for this experiment, as well as the following instructions.
The first page of the Report Form is the raw data from each of the two distillations that is in your notebook. Please write neatly and in ink. Type or word-process if you wish.
The second page can only be filled out after you complete the graphs and analyze the data. Part 1b is explained below. Prepare bar graphs for each of the distillations - one graph per page.
Follow rules of good graphing: Begin your temperature axis at about degrees prior to the actual distillation temperature do not begin at room temperature -- why not?
Do not leave gaps between the bars. Generate graphs from a spreadsheet or graphing program.
Each of the graphs should show distillate fractions that correspond to pure or mostly ethyl acetate, to pure or mostly butyl acetate, and to a mixture of the two. Look most closely at the graph from the Vigreux fractional column distillation.
You should be able to tell fairly clearly the areas of the graph that correspond to mostly ethyl acetate distilling and to mostly butyl acetate distilling since you know their respective boiling points.
The areas of the graph of the simple distillation may not be as clear.
You will have to make some assumptions about the composition of the volumes that are a mixture of the two components you will explain the assumptions in the analysis section, below.
Repeat this analysis for the simple distillation. Use these same volumes for the calculations in 1bbelow.
Keep a copy of your graphs for the next experiment. All calculations should be shown neatly on a separate notebook page, clearly labeled. Pay attention to significant digits. The calculations should be done in your notebook on pages that are a continuation of the Distillation experiment in your notebook and so properly titled and dated.
Turn in the copy as part of your report and keep the original in your notebook. You should now be able to calculate the volume percent of each of the two components in the unknown mixture for each of the distillations. On the calculation page, show explicitly the volumes you are using for the ethyl and butyl acetates and they should correspond to your graph fraction labels.
On the calculation page, explain how you are apportioning the mixture fractions to the ethyl acetate volume and the butyl acetate volume. You might apportion them differently in the simple and fractional distillations, depending on the results on the graphs.Fractional Distillation Essay. 2/21/13 Fractional Distillation with an Introduction to Gas Chromatography When heating a mixture of two or more liquids, even with quite different boiling points, some of the heavier liquid will vaporize and contaminate the recovered lighter liquid.
Gas chromatography uses thousands, if not millions, of theoretical plates to separate volatile mixtures using fractional distillation on a micro-scale.
Here, a mixture of volatiles used to stimulate the olfactory nerves of bees were injected into the gas chromatograph, which was used to separate and identify the compounds based on the amount of. WEEK OF OCTOBER 8, DISTILLATION, GAS CHROMATOGRAPHY AND POLARIMETRY BACKGROUND DISTILLATION This week you will investigate distillation as a method for separating mixtures of liquids.
In General Chemistry you learned that, at a given temperature, a pure liquid will have a specific vapor pressure. ethanol/water mixture.
A fractional distillation will be performed on the mixture and the amount of ethanol will be determined by simple gas chromatography.
Below is an explanation of fractional distillation and gas chromatography. Fractional Distillation Organic compounds have specific boiling points regardless of whether they are pure or.
New york werbeanzeigen analysieren beispiel essay simple and fractional distillation lab conclusion essay le survenant dissertation defense. The purpose of this experiment is to compare the efficiency of simple distillation versus fractional distillation for separation of a mixture of.
Fractional Distillation & Gas Chromatography Essay Sample. Pre-Lab: 1) When two substances whose molecules are very similar from a liquid solution, the vapor pressure of the mixture related to vapor pressure of the pure substance.