3.1 Mass of dried‚ recrystallized aspirin: 1.62g 3.2 Percent yield: 51.75% yield 3.3 Temperature range: 138.2 – 140.0°C 3.4 Appearance: Fine needle like white crystal Introduction Aspirin or acetylsalicylic acid is acquired from salicylic acid‚ which is mild and nonnarcotic analgesic. It helps to remove the substance in the body that trigger pain‚ fever and inflammation. The father of modern medicine was Hippocrates‚ who lived sometime between 460 B.C and 377 B.C. Hippocrates
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and depression. Natural Cures for Depression - Nutrition Omega-3 Fatty Acids: These are a good type of fat that are essential for health of the human brain. Our body cannot synthesize these nutrients. Hence these should be included in the dietary intake. Fish‚ especially fatty ones like salmon‚ sardines‚ mackerel‚ trout‚ and herring are rich sources of these compounds. Studies have found that Omega-3 fatty acids result in low levels of depression. People of Japan and Taiwan‚ who have high
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the RNA bases that are complementary to the DNA template strand that uses uracil opposite to adenine. The RNA polymerase which is an enzyme that moves from the 3’ to 5’end on DNA template strand to synthesis mRNA from 5’ to 3’. b. What is the amino acid sequence produced by translation of the mRNA sequence?
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INTRODUCTION Synthesis Acetylsalicylic acid is an acetyl derivative of salicylic acid which appears as a white and crystalline and a weakly acidic substance with a melting point of 135°C and is also known to be aspirin. It is one of the most widely used drugs that can lower fever and is used as a painkiller. According to (Escobel‚ 2011)‚ Aspirin is synthesized through the reaction of salicylic acid with acetyl anhydride that causes a chemical reaction that turns salicylic acid’s hydroxyl group into an acetyl group
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CHEM%2315%Fall%2014% Creating useful and beautiful molecules using synthetic organic chemistry – Synthesis of Aspirin and Indigo INTRODUCTION Aspirin Salicylic acid occurs naturally in the bark of willow trees. Prior to the 1800’s‚ willow bark was often brewed into a tea‚ or chewed to relieve pain. While the salicylic acid is effective at reducing pain it was found to irritate the lining of the stomach. It was mostly by chance that on August 10‚ 1897 Felix Hoffmann‚ a German chemist who obtained
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Abstract In this piece of coursework I have been investigating the synthesis of Aspirin and checking for presence and purity of Aspirin. Throughout this coursework we have looked at the history of Aspirin; industrial manufacturing; making salicylic acid; the preparation of Aspirin; recrystallization and purity; melting point; thin layer chromatography (TLC) and titration of Aspirin. I’ve learned a lot about Aspirin‚ how it works and how it is made. We found out that the Aspirin we made and used
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constant of acetic acid Chemistry (HL) Research Question: To determine the pH of various mixtures of sodium acetate and acetic acid in an aqueous solution and hence to find the dissociation constant of the acetic acid. Background: The mixture of sodium acetate and acetic acid in aqueous solution is a buffer solution. Buffer solutions are the solutions which resist a sudden change in the pH due to addition of small amounts of strong acid or base. An acidic buffer is a mixture of a weak acid and its salt
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Starting with the weight of .198 g of salicylic acid‚ the moles of the reactant was determined to be 1.43 x 10-3‚ as shown in Equation 3. The purified aspirin product was a white powder that had a weight of .140 g. The number of moles of the purified aspirin product after extraction was 7.77 x 10-4 as shown in Equation 4. These two moles calculated a chemical yield of 54.3% as shown in Equation 5. The melting point of the pure aspirin product was ranged at 117.8-125.2C as shown in Table 1.
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To investigate how does the concentration of Hydrochloric acid affect the rate of reaction? Outline I aim to discover how different concentrations of Hydrochloric acid influence the rates of reaction. In order to carry out this investigation I have decided to use marble chips‚ which I will vary the sizes as powder‚ small chips and large chips. I will also be changing the concentration‚ the different concentrations are as follows 0.2m‚ 0.5m‚ 1m‚ 1.5‚ 2m. I have chosen these concentrations as they
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Energies 2008‚ 1‚ 79-92; DOI: 10.3390/en1020079 energies ISSN 1424-8220 www.mdpi.org/energies Article Esterification of Oleic Acid for Biodiesel Production Catalyzed by SnCl2: A Kinetic Investigation Abiney L. Cardoso‚ Soraia Cristina Gonzaga Neves and Marcio J. da Silva * Departament of Chemistry‚ Federal University of Viçosa‚ Viçosa‚ Minas Gerais‚ Brazil‚ 36570-000. * Author to whom correspondence should be addressed; E-Mail:silvamj2003@ufv.br Received: 5 August 2008; in revised form:
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