CHY251_Lab Notebook - Lab Notebook Index(Labs go MSDS Write...

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Lab Notebook Index (Labs go MSDS, Write up, Spectra) Bread Preservative Lab------------------------------------------------------- 1-2 Eugenol From Cloves----------------------------------------------------------3-5 Isolation of Limonene----------------------------------------------------------6-7 Cyclization of Citronella------------------------------------------------------8-9 Reduction of Carvone--------------------------------------------------------10-12 Oxymercuration of Eugenol methyl Ether------------------------------13-15 Epoxidation / Rearrangement of Limonene----------------------------16-18 Substitution on n-Butyl Alcohol------------------------------------------19-21 Dehydration of t-Amyl Alcohol ------------------------------------------22-24
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Bread Preservative Lab Procedure Obtain 50ml of the preservative. Add 1gr of norit to the flask of preservative over a steam bath and stir. Mix 2gr of Celite in 50ml of water. Pour this over a Buchner funnel switch out the beaker with a new one and pour the preservative into the Celite filter. Take the clear filtrate and slowly add 25-30ml of 6M hydrochloric acid until a white precipitate forms. This is the unknown A. Take .5gr of the unknown and adds 5ml of ethanol in another beaker. Start to heat the solution and stir it. Add 1ml portions of ethanol until the unknown is dissolved. Slowly add water in small increments to the solution until it turns cloudy (after 5-10ml). Add 1-2ml of ethanol to the solution until it becomes clear again. Filter this as fast as possible. Take the filtrate, place it in ice bath, and let it set so crystals can form. Wash the crystals with 2-3ml of cold ethanol: water. Dry the crystals over a Buchner funnel. Add some of sample A to sample B with a mortal and pestle. Do the same with sample A and C. Add the A, AB and AC mixtures to the melting tubes. Place these in the melting point apparatus, raise the temperature to 80 degrees C, and then slowly raise the temperature by 2 degrees a minute. Record the melting range by when the crystals begin to melt until till they are melted completely. Results : Unknown A: 102—111 Degrees C Unknown AB: 102—111 Degrees C Unknown AC: 100—109 Degrees C Unknown B was benzoic acid Unknown C was Mendellic Acid Since the melting point was the same for A and AB, A was also Benzoic acid as a mixture would lower the melting range as it did in AC
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Eugenol From Cloves Procedure : Set up a steam distillation apparatus with a 250ml round-bottomed flask filled with 26gr of whole cloves and 100ml of water. Fill the dropper funnel with 60ml of water. Heat the round-bottom flask with the cloves to boiling then reduce the heat to prevent foaming. Drop the 60ml of water slowly into the condenser as needed for the water that has left the round-bottom flask. Continue boiling until 120ml of product has
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