Alyssa Caparelli Organic Chemistry 12A Professor Alston October 28‚ 2014 Isolation of Chlorophyll and Carotenoid Pigments from Spinach Purpose The purpose of this experiment was to isolate ß-carotene‚ chlorophyll-A‚ and chlorophyll-B from spinach using column chromatography. Spinach was dehydrated using ethanol‚ and the pigments were extracted with dichloromethane. The spinach extracts were dried using CaCl2. Then‚ the solid pigments were run through a column using a non-polar solvent‚ hexane
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process components. Synthetic thread includes both monofilaments and multi-fiber filaments. Synthetic fibers and synthetic fabrics are made from a variety of materials and may feature a blended‚ fibrous structure produced by copolymerization. Acetate and triacetate fibers are shrink-resistant and wrinkle-resistant. Acrylic and modacrylic fibers are unique among synthetic fibers and synthetic fabrics because they have an uneven surface. Aramid and polyimide fibers are lighter and tougher than steel
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Project 1: Polymer Ball Vivian Kim General Chemistry 2045L Introduction Our assignment in this project was to create a bouncy ball for a company using polyvinyl alcohol (PVA)‚ polyvinyl acetate solid and sodium borate‚ by varying the ration of ingredients and to determine the best recipe for our bouncy ball. The company chose the materials because of their odorless and nontoxic properties. PVA is a water-soluble synthetic polymer and has adhesive properties
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10mL pipet 2 aspirator 1 50mL graduated cylinder 1 10mL graduated cylinder 1 50mL beaker 1 100 mL beaker 1 glass stir rod 1 ring stand 1 clamp 1 250mL beaker Distilled water pH paper reagents: 10mL 6M acetic acid 10g solid sodium acetate 25mL 1M naOH NH3 NH4Cl 0.1 solution Safety: Acetuc acid‚ HCl and NaOH are corrosive. They attact the skin and cause permanent damage to the eyes. If one of these solutions splashes into your eyes‚ use the eyewash immediately. Hold your eyes
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The Department of Veterans Affairs (VA) mission is “to care for him who shall have borne the battle‚ and for his widow‚ and his orphan” (Abraham Lincoln) by assisting and honoring the United States Veterans (VA‚ 2015). The strategic planning areas mentioned in the book; the mission; vision; values; grand strategic objectives‚ specific organization‚ benchmarks‚ metrics‚ targets‚ goals and others are similar to the VA strategic planning. Because of the unique mission of the VA‚ some will not be adaptable
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other words‚ we created the perfect eco-friendly bouncy ball. The materials we used to create this eco-friendly ball were polyvinyl alcohol (PVA) and polyvinyl acetate (PVAc) and we reacted them with sodium borate (borax). Polyvinyl acetate (PVA) is a water-soluble synthetic polymer. It has the idealized formula [CH2CH]n. Polyvinyl acetate (PVA) is a synthetic resin polymer. The chemical formula of this component is (C4H6O2)n. The last component is sodium borate (Borax). It is an important boron
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250 ppm‚ 200 ppm‚ 100 ppm‚ and 25 ppm of 12C solution was prepared from a caffeine stock solution using ethyl acetate as the solvent. 250 µL of each dilution was added to a respective 0.6 mL vials with 50 µL of 13C and mixed. Next‚ three 15 mL centrifuge tubes were labeled as “Unknown A‚” three were labeled as “Unknown B” and one was labeled “Control.” To each tube‚ 4 mL of ethyl acetate and 1 mL of the respective unknown or control (100 ppm 12C solution) was added to the respective flasks. Each
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The percent yield of the isopentyl acetate was 74.3% and this low percent yield could have occurred due to some amount of gas escaping from reflux apparatus’ top or apparatus was not fully closed so that some of the heat escaped and did not proceed the reaction well‚ leaving reagents. Another source of error could be that some of the organic layer could have been transferred along with the aqueous layer when the aqueous layer was getting separated from the organic layer by a pipette. One of the
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The Alabama Department of Veterans Affairs administers programs to aid Alabama’s military veterans and families‚ and provides free assistance and advocacy for Alabama veterans seeking benefits from the U.S. Department of Veterans Affairs. Alabama has a long history of caring for its military veterans‚ dating from the Civil War. In 1927 Alabama established the State Service Commission to assist veterans with claiming benefits and other services for which their military service made them eligible.
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Preparing Isopentyl Acetate by the Fischer Esterification Preparing Isopentyl Acetate by the Fischer Esterification Leah Monroe May 8‚ 2003 Organic Chemistry Lab II Experiment performed on April 29 and May 1‚ 2003 Abstract: The purpose of this experiment was to synthesize isopentyl acetate via an esterification reaction between acetic acid and isopentyl alcohol‚ using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate‚ as well as with water
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