EXERCISE 11 SYNTHESIS OF ASPIRIN MARAVILLA‚ Ana Mikaela B Group 4 CHEM 40.1 1L Date performed: September 30‚ 2013 Date submitted: October 7‚ 2013 VI. RESULTS AND DISCUSSION Aspirin is prepared by the esterification of salicylic acid with acetic anhydride under acidic conditions. The phenol group in salicylic acid is replaced by a carboxyl group through electrophilic substitution. The mechanism for the reaction can be summarized
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Candidate Number Surname Other Names Examiner’s Initials Candidate Signature Question General Certificate of Secondary Education Higher Tier January 2013 Science A BL1HP H Unit Biology B1 Biology Unit Biology B1 Wednesday 9 January 2013 9.00 am to 10.00 am Mark 1 2 3 4 5 6 7 8 TOTAL For this paper you must have: a ruler. You may use a calculator. Time allowed 1 hour Instructions Use black ink or black ball-point pen. Fill in the boxes at the top of this page. Answer all
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SYNTHESIS AND CHARACTERIZATION OF POLYANILINE/POLY (P-HYDROXYANILINE)/Fe3O4 MAGNETIC NANOCOMPOSITE M. R. SABOKTAKIN‚ A. M. MAHARRAMOV‚ M. A. RAMAZANOV Baku State University‚ Baku‚ Azarbaijan E-mail: mamed_r50@mail.ru Several composites have been studied for static dissipationand microwave absorbing materials based on polyaniline with metallic oxides. These composites which are conducting polymers have been widely used because of their lower density as well their good environmental stability as in
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Jennie K. Daniels Organic Chemistry 2121 11 February 2014 Synthesis of Aspirin Salicylic acid derivatives‚ or salicin‚ are found in the bark of the willow tree. In the 5th century B.C.‚ Hippocrates ground the bark into a powder‚ and later‚ the Natives Americans chewed on the bark to alleviate fever and pain1. In the 19th century‚ a German chemist by the name of Felix Hoffman wanted to find a medication that would ease
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BIOLOGY 1403 – ANIMAL BIOLOGY SP2013 Dr. Matthew Kaser Office: South Science 402 matthew.kaser@csueastbay.edu Office Hours: W 3:30-4:30 Objectives – To introduce students to the science of animals by: * Comparing the structural and functional characteristics of different animal groups in an evolutionary and ecological context. * Conducting experiments‚ collecting and analyzing data‚ and writing scientific papers‚ and through hands-on interaction with animal phyla *
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Abstract Introduction The acylation of the α carbon position of a carbonyl group is one of the greatest breakthroughs that has benefited chemists in organic synthesis particularly when in need of building a carbon skeleton of interest in a molecule. For one to be able perform this acylation technique‚ there are two mar approaches which are employable. The first method involves the deprotonation of the α-Carbon atom which has a pKa known to be ̴20 through the use of a strong base for instance
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Sanders Mrs. Touchstone AP English 12 17 November 2012 Animal Imagery of Moral Reversal In William Shakespeare’s Macbeth‚ the theme of moral corruption is portrayed through the moral reversal of animals through out the play. Shakespeare utilizes this strategy to help establish the theme to his audience. This type of reversal is usually connected with Macbeth himself and the more he grows self corrupt‚ the more abundant the animal imagery. Toward the beginning of the play‚ Macbeth is portrayed
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The human eye can see objects as small as one tenth of a millimeter‚ which is smaller than a grain of salt. An animal cell is not visible to the naked eye and is about 10 to 30 micrometers. A micrometer is one one-thousandth of a millimeter. They are so small that it takes a microscope with a magnification of at least 400x to be able to see inside the cell. These cells are what make up the basic units of structure and function in all living things. They carry out our life processes and make it possible
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Purpose: To synthesize 1‚2‚3‚4-tetraphenylnaphthalene through a two-step synthesis. The aldol condensation reaction between benzil and dibenzyl ketone forms 2‚3‚4‚5-tetraphenylcyclopentadienone‚ which then reacts with a benzene formed by anthranilic acid and isoamyl nitrate in order to yield 1‚2‚3‚4-tetraphenylnaphthalene. Reaction Equation A: Synthesis of 2‚3‚4‚5-tetraphenylcyclopentadienone: A solution of 4 capsules potassium hydroxide (0.5g) and 5mL anhydrous ethanol was prepared
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Terrence Smith Advanced College Writing Dr. Ruby Parker Argument Synthesis April 21‚ 2011 Argument Synthesis In Mr. Siemiesz’s chapter he explained about the National Security Consequences of U.S Oil Dependence and how it could be fixed and changed for the best interest of the country; Mr. Siemiesz outlined specific points or steps the country could take to make those changes he outlined in the chapter. “Those major energy suppliers from Russia to Iraq to Venezuela have been increasingly
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