A glacier is a large body of ice that is formed on land from the compaction and recrystallization of snow. Glaciers move slowly downhill due to gravity. The erosion features of a glacier can be extremely large or extremely small. As a glacier moves‚ its scours away material underneath it pulling up rocks‚ this is the material that is embedded
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Nitration of Naphthalene Wed 2/25/2015 Lab report # 1 Abstract: The purpose of this experiment was to nitrate naphthalene with nitronium ion‚ which is formed at low concentration from a reaction of nitric acid and sulfuric acid. The percent yield from the experiment was 54.4% of the product‚ and the melting point of the possible results were 59 °C for 1-nitronaphthalene‚ and 78°C for 2-nitronaphthalene. Introduction: Polynuclear aromatic hydrocarbons such as naphthalene can be nitrated
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Abstract: The objective of this experiment was to successfully prepare an endo‚cis-diacid from the synthesis of the bicyclic anhydride (cis-Norbonene-5‚6-endo-dicarboxylic anhydride). The percent yield of the product was calculated and found to be 39.01%. The infrared spectroscopy confirmed the presence of a O-H group with a stretch at 2948.03 1/cm and the presence of C=O with a stretch at 1698.93 1/cm. Melting point determination found the melting point range of the products to be 149.2-164.1 for
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benzaldehyde (5 mmol) were dissolved in dry methanol (30 ml) and catalytic amount of sodium hydroxide was added to the above solution. The reaction mixture was stirred for 30 min and then neutralized with 1 N HCl. The products were purified by recrystallization from ethyl alcohol and water. The synthetic procedure and reaction conditions for chalcones are illustrated in scheme 1 Animals Adult male Swiss albino mice (25-30 g) were used for this study with access to food and water ad libitum. The animals
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In the reaction mechanism‚ the alpha hydroxyketone’s hydroxylic group attacks the positively charged nitrogen from nitric acid attaching it to the molecule. The nitrogen’s electrons are then kicked off on to the oxygen bearing a positive charge‚ creating water. This process formed an organic nitrate. Next‚ water is used to abstract hydrogen from the positively charged oxygen‚ forming hydronium. A carbonyl is formed as well as nitrogen dioxide gas. Simultaneously the oxygen separates itself from nitrogen
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Afterwards an extraction is used to separate the organic layer (bottom) from the aqueous layer (upper). By using a rotary evaporator‚ it evaporates the organic solvent and forms the crude caffeine. Afterwards we used acetone-petroleum ether for recrystallization and the vacuum apparatus for filtration to obtain pure caffeine. At the end the melting point of the pure caffeine was obtained. (Reference: Organic Chemistry Laboratory Manual) Experiment Scheme: We used 250 mL of water and 20.08 g
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Guide Questions Experiment 1 Calibration of the calorimeter: 1. Give the net ionic thermochemical equation of the reaction used to calibrate the calorimeter. a. Is the reaction endothermic or exothermic? b. Which is the limiting reactant? c. How much (in moles) limiting reactant was used? d. How much heat was generated (or absorbed) by the reaction? 2. Relate the sign of the ΔT to the ΔH of the reaction used for calibration. 3. What is the heat capacity of the calorimeter? Relate
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The purpose of this experiment was to perform a wittig reaction‚ the horner-emmons wittig specifically‚ reacting an aldehyde with an ylide to make an alkene. This particular variation of the wittig reaction has several advantages: It gives only the trans product; it uses a much milder base that is easier to handle; and it gives a water soluble byproduct which is easy to separate from the product. The reason that these advantages occur is a change in the structure of the ylide. Instead of a tripheylphosphine
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ASSIGNMENT ON PHARMACEUTICAL IMPORTANCE OF STEREOCHEMISTRY PREPARED FOR: Nowshin Nowaz Rumzhum Lecturer‚ Dept. of pharmacy Stamford University Bangladesh PREPARED BY: Md. Wahid Rezwan ID No: BPH02805674 Batch No: 28th D STAMFORD UNIVERSITY BANGLADESH Introduction: Stereochemistry may seem like a trivial
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to meta position. Nitric acid‚ sulfuric acid‚ and methyl benzoate will be mixed and added to an ice bath. Crushed ice will be added to this cold mixture and form crystals. After crystal product of m-methylbenzoate forms and purifies through recrystallization‚ its MP and IR will be taken to test purity and validate predicted position of the nitro group. Weight of final product will be compared to crude weight to determine effectiveness of procedure. It is possible to obtain small amounts of ortho
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