aspirin was found to be salicylic acid‚ which has the phenolic and carboxylic acid groups that causes irritation in the lining of the stomach‚ mouth and the throat. Thus‚ acetyl anhydride was added to salicylic acid and the reaction synthesises acetylsalicylic acid‚ which contains an ester group. The addition of acetyl anhydride causes the phenolic group in salicylic acid to change to an acetyl group‚ R—OH R—OCOCH3 Hydroxyl group
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and by prescription (Rx) from a physician. OTC preparations: Aspergum‚ Bayer Aspirin‚ Bufferin‚ Ecotrin‚ Empirin‚ Halfprin‚ St. Joseph Aspirin‚ and many generics. Rx preparation: ZORprin Aspirin is synthesized from the acetylation (using acetic anhydride or acetyl chloride) of salicylic acid. Salicylic acid is a natural product
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Abstract: This experiment is to demonstrate the preparation of paracetamol and its properties. Reflux and filtration of 4-aminophenol and acetic anhydride formed the crude sample. Further analysis of dry white crystals were used to give quantitative measurements and a percentage yield of 46% was obtained. The overall conclusion is that the acetic anhydride reacted with the –NH2 group. Materials and Methods: 1. We weighed out (on a top-pan balance) 4-aminophenol (about 11.0g) in a weighing boat
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Viscosity of Liquids Part I: Low Viscosities Mona Kanj Harakeh 1 Objectives • To measure and analyze the viscosities of ideal (Toluene/p-Xylene) and nonideal (Methanol/Water) binary solutions and their components. • To determine the Activation Energy to viscous flow. • The effect of temperature change on the viscosity will be studied. Method: The viscosities of liquids are determined by measuring the flow time for various liquids in an Ostwald viscometer. 2 Ostwald viscometer 3
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Psychoanalytic Personality People have called Dr. Sigmund Freud one of the greatest psychologists of all times. Within a short period of time he had many others that were followers. Jung and Alder later join Freud and some people called them the three wise men. In my paper I will be comparing and contrasting the psychoanalytic theories of Freud‚ Jung‚ and Adler. I will also mention which two characteristics of theories that I disagree and agree with. Describing and explaining the stages of Freud’s
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aspirin. The experiment has been carried out on a small laboratory scale. The experiment starts by combining such chemicals such as salicylic acid and acetic anhydride. The synthesis of aspirin is classified as an esterification reaction. This is a substitution reaction where the alcohol group from salicylic acid reacts with ascetic anhydride to form an ester‚ (acetylsalicylic acid) which is commonly known as Aspirin. The report progresses further giving details to the procedure carried out and the
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Simple distillation works well when the two components boiling points have a large difference. Fractional distillation works best when the components boiling points have a small difference. The boiling point of cyclohexane is 80 degrees Celsius. Toluenes boiling point is about 110 degrees Celsius. The liquid with a higher vapor pressure is higher in concentration and would be collected first. Raoult’s law states: the vapor pressure of an ideal solution is dependent on the vapor pressure of each chemical
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Acetylsalicylic Acid (Aspirin) Synthesis Telow‚ AJV Sumicad‚ CJ‚ Tavanlar‚ EMMT‚ Chem 40.1‚ Institute of Chemistry‚ University of the Philippines Los Baños I. Introduction Organic synthesis is the process where a desired organic compound is constructed or prepared from commercially available materials. The objective of organic synthesis is to design the simplest synthetic routes to a molecule. Aspirin‚ also known as acetylsalicylic acid is as salicylate drug often used as analgesic
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Master iit academy 2nd Floor‚ Samsung Plaza‚ Near Benz Circle‚ VIJAYAWADA PHYSICAL CHEMISTRY (1) Shielding constant σ for Ne is 4.15 and the effective nuclear charge on Na+ and F- are respectively (A) 4.85 6.85 (B) 5.85 6.85 (C) 6.85 4.85 (D) 4.85 4.85 (2) Electron gain enthalpy and ionization energy of an atom are –a and +b eV respectively. The electronegativity of that atom on Mulliken scale is given by (A) a – b (B) (b – a )/2 (C) a + b (D) (a + b)/2 (3)
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Lab report: Viscosity of Liquids Introduction This experiment focuses on measurements of different trials of various concentrations. The collected data is used to compare and contrast to the ideal binary solutions and their components. The Ostwald viscometer is a useful laboratory equipment to measure the viscosities of many binary solutions. Background Molecules have the ability to slide around each other‚ result in a flow. Such a flow has a resistance called viscosity. Microscopically
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