9.2 column TLC.docx - Expt 9.2 Column Chromatography Separation of Fluorine/9-Fluorenone Mixture Christina McCool CHE210L Lab Section 13 November 8 2018

9.2 column TLC.docx - Expt 9.2 Column Chromatography...

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Expt: 9.2 Column Chromatography: Separation of Fluorine/9-Fluorenone Mixture Christina McCool CHE210L Lab Section 13 November 8, 2018 November 15, 2018
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I. Abstract The purpose of this was to separate a Fluorine: 9- Fluorenone mixture using column chromatography. 5 fractions were extracted from the column chromatography with fraction 1 containing 9- Fluorenone and Fraction 5 containing Fluorine. There was 0.018g of Fluorine recovered with a percent yield of 72%. There was 0.011g of 9- Fluorenone recovered with a percent yield of 44%. O II. Introduction 1. Briefly describe the process of column chromatography. Why is it called “adsorption” chromatography. Make it clear in the discussion what the stationary and mobile phases are (CAREFUL, not were) in this lab and how they work together to effect separation. First, isolate the desired compounds from a mixture. The stationary phase a solid adsorbent, placed in a column. The mobile phase is a liquid that is added to the top and flows down the column In this lab, the absorbent was alumina (stationary phase) and the solvent (mobile phase) was ether. It’s called "adsorption" chromatography because the stationary is a solid adsorbent. When the mixture is loaded into the column, its molecules bind to the stationary phase (adsorbed). The interactions between the sample and the stationary phase will depend upon the acidity that they possess.
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