SpearmintCarawayOilNotesfall2004

SpearmintCarawayOilNotesfall2004 - decimeter tubes, and you...

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Procedure for Carvones Lab We will perform part A of the lab only. In order to fully understand the experimental procedure for this lab you will need to read Techniques 23, 24 and 9.6 (boiling point determination using a Thiele tube) before performing this experiment. Boiling Points We will use the procedure listed in technique 9.6 for microscale boiling point determination. There are Thiele tube setups in the lab for performing this part of the experiment. Be careful that the rubber band is above the oil since the hot oil will weaken it and it may break. Polarimetry There are pre-filled, labeled, polarimeter tubes containing each of the pure (+) and (-) carvones in the lab for use with the polarimeters. You can calculate the specific rotation from the observed rotation using the procedure listed on page 860. We are using 0.5
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Unformatted text preview: decimeter tubes, and you will need to look up the density (g/mL) for each of the (+) and (-) carvones. Should these be the same? Refractive Index You need to place a single drop of your carvone on the lens and adjust the light to get maximum illumination through the eyepiece. There is no need to run water through the sample since our measurements will be close to 20 C. Adjust the coarse/fine knobs on the right side of the refractometer so that the shadow edge is just horizontally even with the center cross-hairs in the eyepiece. Read the refractive index by pressing the button on the left side toward the back. The scale will appear in the eyepiece when the button is pressed. We will not be performing IR, NMR or GC on our samples....
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This note was uploaded on 07/10/2011 for the course BCH 4033 taught by Professor Stern during the Summer '11 term at UNF.

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