51LA Exp7 F10 - EXPERIMENT 7 ISOLATION OF LIMONENE FROM...

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51LA 1 Rev 9/26/10 EXPERIMENT 7 ISOLATION OF LIMONENE FROM ORANGE PEELS Tuesday, November 9 - Thursday, November 18, 2010 Technique: Steam Distillation Category: Purification Technique: Polarimetry Category: Identification Steam distillation is used to isolate organic compounds that are immiscible liquids with water and have reasonably high vapor pressure at the boiling water temperature. We will use this technique to isolate limonene from orange peels. Limonene is a chiral compound, so we will use polarimetry to determine the specific rotation of our limonene sample and use that data to determine the enantiomeric excess (optical purity) of our limonene sample. Reading Assignment for Experiment #7 Read Technique 13.6: Steam Distillation pgs 164-166 . (Section 11.7 pgs 153-156 in the 2 nd Ed. Read Technique 16.5-16.7: Optical Activity and Enantiomeric Analysis pgs203-211 (Technique 14 pgs 165-174 in the 2 nd Ed.) Read Experiment 6: Isolation of Essential Oils from Plants pgs 37-39 & 44- 46 from Modern Projects Review Extraction techniques and Ch 5 in your Lecture text book. Pre-lab Questions: 1) Suppose a student is measuring the optical rotation of a 1 M sample of ( S )-(-)- Limonene. The path length is 13cm.
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This note was uploaded on 11/23/2010 for the course CHEMISTRY Chem 51 LA taught by Professor Dr.reneelink during the Spring '10 term at UC Irvine.

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51LA Exp7 F10 - EXPERIMENT 7 ISOLATION OF LIMONENE FROM...

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