Department of Chemistry University of Kentucky EXPERIMENT 5 Molecular Absorption Spectroscopy: Determination of Iron With 1‚10-Phenanthroline UNKNOWN Submit a clean‚ labeled 100-mL volumetric flask to the instructor so that your unknown iron solution can be issued. Your name‚ section number‚ and locker number should be written legibly on this flask. The flask does not need to be dry on the inside‚ but needs to have been rinsed with distilled water after it has been washed. The flask
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Chemistry 1: PROBLEM SET SY 2012/2013 CLASS #: _______________ NAME_________________________________________ SECTION: ______________________ Stoichiometry II - Mole Calculations/ Limiting and Excess Reagent – Lecture Notes 1. Given the balanced equation N2(g) + 3H2(g) 2NH3(g) How many moles of ammonia are produced when 0.60 mol of nitrogen reacts with hydrogen? 2. Given the equation: SiO2 + HF SiF4 + H2O a. Calculate the number of moles HF that would completely react with 2.5 moles of
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Aloe (Aloe vera) is a major and traditional medicinal plant under family of Liliaceae. Aloe consumed externally and internally as well. It is used externally to treat several skin burn conditions‚ sunburn and poison oak‚ infections‚ and eczema. It is confirm that juice from Aloe vera ease pain and decrease inflammation. It has antiseptic and antibiotic properties in treating cuts and abrasions. Aloe juice used to treat people with ulcerative colitis‚ an inflammatory bowel disease. Moreover it acts
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Chemistry of Spices This page intentionally left blank Chemistry of Spices Edited by Villupanoor A. Parthasarathy Indian Institute of Spices Research Calicut‚ Kerala‚ India Bhageerathy Chempakam Indian Institute of Spices Research Calicut‚ Kerala‚ India and T. John Zachariah Indian Institute of Spices Research Calicut‚ Kerala‚ India CABI is a trading name of CAB International CABI Head Office Nosworthy Way Wallingford Oxfordshire OX10 8DE UK Tel: +44 (0)1491 832111 Fax:
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Enzymes and their importance in plants and animals (25 marks) Enzymes are biological catalysts‚ which accelerate the speed of chemical reactions in the body without being used up or changed in the process. Animals and plants contain enzymes which help break down fats‚ carbohydrates and proteins into smaller molecules the cells can use to get energy and carry out the processes that allow the plant or animal to survive. Without enzymes‚ most physiological processes would not take place. Hundreds of
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pH MEASUREMENT AND BUFFER PREPARATION ! ! 2A—Pharmacy‚ Faculty of Pharmacy‚ University of Santo Tomas Canare‚ Ann Shery; Caraos‚ Aeraille Diane; Carillo‚ Pauline Mari; Carreon‚ Leslie Ann; Co‚ Alexandra Kay !! !! ABSTRACT. The regulation of internal pH is a physiological function of major importance for all organisms. The quantity pH is intended to be a measure of the activity of hydrogen ions in solution. Buffers‚ on the other hand‚ are solutions containing a substantial concentration of both
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Am J Obstet Gyneco. 2009; 200:329‚ e321–328. 12. Pantoja M‚ Medeiros T‚ Baccarin MC‚ Morais SS‚ Bahamondes L‚ Fernandes AM. Variations in body mass index of users of depot-medroxyprogesterone acetate as a contraceptive. Contraception. 2010; 81:107–111. [PubMed: 20103446] 13. Burke GL‚ Bild DE‚ Hilner JE‚ Folsom AR‚ Wagenknecht LE‚ Sidney S. Differences in weight gain in relation to race‚ gender‚ age and education in young adults: the CARDIA Study
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HPTLC and 0.05g of the crystallised product above was placed into a sample vial which contained 1cm3 of ethyl acetate solvent shaken and dissolved. This sample of synthesised solution and a further two other solutions of pure paracetamol and 4- aminophenol solution sample were separately loaded by capillary action in different positions. These were then placed in a jar containing ethyl acetate (2cm3) and the results were visualized under the UV
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base. Buffers usually consist of a weak acid and its conjugate base‚ in relatively equal and "large" quantities. A buffer system can be made by mixing a soluble compound that contains the conjugate base with a solution of the acid such as sodium acetate with acetic acid or ammonia with ammonium chloride. The buffer capacity refers to the maximum amount of either strong acid or strong base that can be added before a significant change in the pH will occur. This is simply a matter of stoichiometry
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Jacobsen’s Method of Epoxidation of an Alkene | | Abstract Various types of reactions were completed to first create and then use Jacobsen’s catalyst in the asymmetric epoxidation of an unknown alkene with bleach in the laboratory. The chiral epoxide synthesized was then characterized with GC/MS and NMR. With this information the unknown alkene was able to be identified as 4-chlorostyrene. Introduction Organisms have evolved with mechanisms that use specific enantiomers of molecules
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