different analgesic.A separate capillary tube is used for each sample.The acetaminophen solution is first spotted‚then the caffeine‚then the unknown A‚then aspirin‚and lastly the unknow B. B.Developing the TLC plate 1.A developing chamber is prepared as indicated in figure 3(ii)‚a 250mL beaker is used as a chamber‚a half piece of filter paper inside‚and aluminium foil to cover. 2.the eluent ‚2:1 mixture of ethyl acetate:hexane is poured‚into a beaker to a depth of under 1cm(about 15mL).About 5
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Experiment 22: Synthesis of Aspirin and Oil of Wintergreen Performed 01/31/2013 Received 02/07/2013 Organic molecules have a wide range of applications occur both intracellular as well as in many different industries. The reactions use the reactivity of functional groups attached to organic molecules‚ as well as general chemistry concepts such as Le Chatelier’s Principle (). The synthesis of Aspirin (its chemical name being acetylsalicylic acid) and of oil of wintergreen (with its chemical
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Purification of Recombinant Green Fluorescent Protein (rGFP) From E. coli strain‚ BL21(DE3)‚ Using Ni2+-Agarose Affinity Chromatography Abstract: The purpose of these series of experiments was to express and purify recombinant Green Fluorescent Protein (rGFP) from the E. coli strain‚ BL21(DE3) by beginning with its purification via a Ni2+-agarose affinity chromatography column. The His6 tag of the rGFP bound to the Ni2+-agarose column and washes and elutions were obtained‚ with elution 3 containing
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9.1 Orbitals and Theories of Chemical Bonding 1. Which one of the statements concerning valence bond (VB) and molecular orbital (MO) bond theories is correct? a) MO theory predicts that electrons are localized between pairs of atoms. b) In VB theory‚ bonding electrons are delocalized over the molecule. c) MO theory accurately describes bonding in O2 and NO‚ VB theory does not. d) VB theory can describe molecular bonding in excited states. e) MO theory is used to accurately predict
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The purpose of this lab was to use gas chromatography to determine the relative amounts of the three components of gas products from the dehydration reaction of 1- and 2-Butanol with sulfuric acid and the dehydrobromination reaction of 1- and 2-Bromobutane with potassium tert-butoxide. E1 reactions are two-step unimolecular reactions. The first step of an E1 reaction occurs when a leaving group‚ which consists of a weak base‚ leaves an organic compound‚ leaving an intermediate carbocation. In the
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to synthesise acetylsalicylic acid (aspirin) by creating a reaction between acetic anhydride and salicylic acid. This was be accomplished through the use of recrystallization. Acetic anhydride and salicylic acid are mixed together‚ and then acidified by the addition of a few drops of concentrated sulfuric acid‚ which catalyzed the reaction. The percent yield is calculated to determine the effectiveness of the reaction in preparing the desired product (aspirin). The limiting reactant of the equation
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Micah Garman - CPO# 248 Dr. Burke - Greek Exegesis II Exegetical Paper Sexual Purity: A Call to Holiness INTRODUCTION The world in which Christians live today is very similar to the world that Paul taught‚ lived‚ and traveled in. Christians are surrounded by and struggle with the issue of sexual purity that believers struggled with in Paul’s day. Sexual immorality is a result of a much larger problem: the refusal of God’s call to be holy. The pagan Gentiles during the New Testament had a
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Purpose 1. To prepare a dry-packed sample of product mixture of ferrocene and Acetylferrocene 2. To separate and purify the components in the product mixture by column chromatography. 3. To check the purity of the components by thin-layer chromatography (TLC). 4. To calculate the yield of acetylferrocene and the percent recovery of unreacted ferrocene. Table of Quantity showing various physical properties Type of substance Molecular Formula Molecular Weight (g/mol) Density(g/cm3) M.P
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What is the more formal chemical name for aspirin? Acetylsalicylic acid 2. Using your data from Experiment 2‚ how can you be sure you synthesized aspirin? By using the colors as a guide‚ we can compare the Acetylsalicylic acid + 8 mL FeCl3 to the Aspirin Crystals from Experiment 1 + 8 mL FeCl3 in order to see if it synthesized. 3. Would you say that your synthesized aspirin is relatively pure? How can you tell? One way that the purity of aspirin can be judged is by it’s color as pure acetylsalicylic
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play blackeys’ games and generally manifest a desire to be blacks. Well‚ Niss Moses‚ if this were a common phenomenon‚ we most assuredly would have such a word‚ but it happens not to be.” — William Satire (alias Douglas Hofstadter)‚ “A Person Paper on Purity in Language” I highly enjoyed Douglas Hofstadter’s piece. Although I had never given any serious thought to the problem of sexism in English‚ I found myself strongly agreeing with many of his arguments. In fact‚ I even became a bit angry and
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