Report of Experiment 1 Purification and Identification of An Unknown Mixture Aim To separate a mixture of a neutral (ester‚ alcohol‚ ketone‚ aldehyde or ether) and an acidic compound (phenol or carboxylic acid) or a neutral and a basic compound (amine)‚ and to identify the unknown mixture by physical (M.P. or B.P.) and spectroscopic methods (NMR‚ IR and MS). Method The mixture (sample number: 27) was dissolved in 200 mL of CH2Cl2 and then extracted with 10% NaOH. The acid was removed by adding
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Faults of woven fabric: Bar: It is a band running across the full width of cloth. Pick bar due ti difference in pick spacing Tension-bar due to difference in weft tension Weft-bar due to difference in material count‚ twist etc Box marks: The causes of box marks are – Dirty box Shuttle riding over the weft Dirty shuttle Dirty picking and ticks Broken pattern: It occurs due to wrong drawing of threads insertion of thee pick‚ incorrect lifting of warp threads. Broken pick:
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Chapter 4- storyline The Chesapeake said life was nasty‚ brutish‚ and short because there were diseases‚ the climate was unhealthy and life expectancy was less than 20 years of age. Although life was unhealthy for humans‚ it was healthy enough to grow tobacco. They didn’t have anybody to plant the tobacco because life expectancy was short and people were dying because of the harsh diseases‚ so they got indentured servants‚ who were people who voluntarily mortgaged the sweat of their bodies for several
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Experimental Synthesis of Bupropion – A round bottom flask (RBF) containing m-chloropropiophenone (1.0 g‚ 5.9 mmol) dissolved in 5.0 mL dichloromethane (DCM) with 0.25 mL of 1.0 M Br2 in DCM was briefly warmed to initiate the bromination reaction. Afterwards‚ the RBF was placed in and ice-water bath and 1.0 M Br2 in DCM (6.0 mL‚ 6.25 mmol) was added dropwise while stirring. DCM was removed from the reaction by rotary evaporation. Next‚ tert-butylamine (5.0 mL‚ 47.6 mmol) and 5.0 mL of N-methylpyrrolidinone
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Conduct Disorder Johnny‚ age 10‚ is admitted to the psychiatric unit for evaluation. Following is Johnny’s case history. Erin gave birth to Johnny. She is an unmarried 16-year-old girl who chose to keep Johnny with her and tried to raise him herself. In beginning she lived with her parents and continued her high school after Johnny’s birth. She was very irresponsible‚ had no source of income‚ contributed little to her needs‚ and used to smoke marijuana with her friends. Erin’s parents took Johnny’s
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unpaired electrons on the oxygens. In other words‚ one side of the molecule has two amides and is more negatively charged due to the lone pairs of electrons on the two nitrogens and the two oxygen (6 pairs of lone electrons)‚ while the other side has 1 amine and is less negatively charged. On the other hand‚ aspirin is only slightly polar in comparison to the other compounds. This is because it has an ester group and carboxylic acid group; however‚ only the oxygen in the carboxylic acid has lone pairs
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2008 APEC Clean Development Conference – The Current Applications and Future Promotion of Green Chemistry for Sustainable Development National Tsing-Hua University‚ Hsinchu‚ Chinese Taipei Dec.15.2008 Green Chemistry for the Improvement of Human Welfare Gwo-Dong Roam ‚ Wan-Yi Wu‚ Chung-Han Chiou‚ Chung-Wen Yen Office of Sustainable Development Environmental Protection Administration‚ Chinese Taipei Tel: 02-23822841; E-mail: gdroam@sun.epa.gov.tw Viewpoints & Experiences: . Roadmap:
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Running head: Organic Chemistry Tamanna Ashraf Palm Beach State College Principle of Chemistry Ceravolo‚ Joseph MW 11:00am-12:15pm February 6th‚ 2011 We all are living in a science world. Everything has some kind of reaction going on in our living area. It is just we do not get to see or realize that where n how we having our life much easier than it used to be. In these writing assignments‚ the topic is about the organic chemistry. In organic chemistry‚ we all have different kinds of compounds
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14 may be a possible EEC. Moreover‚ the calculated compensation temperature by inverting the straight line slope‚ T comp = 57.9 ºC‚ is higher than the average experimental value‚ T exp = 32.5 ºC. This great difference between these two values of temperatures might reflect the existence of real EEC rather than experimental error [58]. Another evidence of EEC is the approximate constant ∆G # with a significant change in both ∆H # and ∆S # . Finally‚ EEC was also investigated by using
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THEORY: The Diels-Alder cycloaddition reaction was discovered by Otto Diels and Kurt Alder and is very useful in the synthesis of polycyclic compounds. The Diels-Alder reaction can be described as: [4+2] cycloaddition- a diene with 4 π electrons + 2π electrons from the dienophile; a pericyclic concerted reaction- meaning the reaction occurs in a single step (no intermediates) and involves a cyclic redistribution of bonding electrons. In order for a Diels-Alder reaction to take place
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