recrystallization. We will then record the products’ melting point and calculate the yield in order to determine the degree of purity of the aspirin sample. Diagrammatic scheme for the reaction: OBSERVATIONS: When 5g of salicylic acid‚ 7.5 cm3 of ethanoic anhydride and 3 drops of concentrated sulphuric acid were mixed‚ a white milky solution was formed. This solution was heated and a yellow liquid formed. 75 cm3 of distilled water was added and the yellow liquid became cloudy with white precipitates visible
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Amrita VISHWA VIDYAPEETHAM (University established u/s 3 of UGC Act 1956) Amrita Entrance Examination – Engineering PHYSICS‚ CHEMISTRY & MATHEMATICS Question booklet Version Code Question booklet no. Number of pages Number of questions Time 120 : 3 hrs Max. Marks : 360 Registration number Name of the candidate Signature of the candidate INSTRUCTIONS TO THE CANDIDATES GENERAL 1. Any malpractice or attempt to commit malpractice in the examination hall will lead
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solid is an odourless solid chemical that has a flake or leaf like appearance. It is also known as N phenylacetamide‚ acetanil or acetanilide. Its former trade name was antifebrin. As mentioned earlier acetanilide can be produced by reacting acetic anhydride with aniline. C6H5NH2 + (CH3CO)2O → C6H5NHCOCH3 + CH3COOH (http://www.mendelset.com/articles/680/preparation-recrystallization-acetanilide) (regensburg.de/Fakultaeten/nat_Fak_IV/Organische_Chemie/Didaktik/Keusch/Grafik/box_brom_ar1.gif)
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Aspirin‚ which is also known as acetylsalicylic acid. C9H8O4 is the chemical format for Asprin. The chemical structure of aspirin: Aspirin is anti-inflammatory. Aspirin is prepared by chemical synthesis from salicylic acid‚ by acetylation with acetic anhydride. The fact that it is an acid allows us to quantify the amount of aspirin in a solution. We would do this by by using an acid-base titration. Sodium hydroxide (NaOH) will be used In this experiment as the base. Preparation • Lab coats should
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CH4300/PY5140 - EXPERIMENT 2 – Answer Sheet SYNTHESIS OF THE PHARMACEUTICAL ASPIRIN (ACETYLSALICYLIC ACID) Aim: The aim of this experiment was to react salicylic acid with ethanoic anhydride to produce Aspirin. CH3CO)2O + HOC6H4COOH → CH3CO2C6H4CO2H + CH3COOH i Mass: 5g Volume: 7.5 cm3 Mass: 6.52g RMM: 138g/mol RMM: 180g/mol Moles: 5/138 = 0.0362 RMM: 102g/mol Moles: 0.0362 OBSERVATIONS – First‚ Ethanoic acid was added to the salicylic acid which resulted
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te‚ rr*‚.ktn Bachelor’s Degree Programme (BDP) ASSIGNMENT (For July 2013 and January 2014 Sessions) Foundation Course in English FEG-02 fiort:nn frWw&ffiL;qLq*s/jr lfirf Ff {)pr.f .s *4ry:Ffl r uNtvERsrlnl School of Humanities Indira Gandhi National Open LTniversity Maidan Garhi‚ New Delhi-l10068 FOUNDATTON COURSE rN ENGLTSH (FEG-02) Programme: BDP/201 3-l 4 Course Code: FEG-02 Dear students. You are required to do one assignment for the Foundation Course in English-02
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LIDE Learning Center‚ Inc. 6539 Isabel‚ Leyte Synthesis of Aspirin An Investigatory Project Presented to: Edmundo A. Quiñones Chemistry Teacher In Partial Fulfillment of the Requirements In Science and Technology III (Chemistry) Presented by: Kenneth Ivan P. Durano Cyrill Val G. Lozano March 6‚ 2010 APPROVAL SHEET This investigatory project entitled “The Synthesis of Aspirin” requirement for Science and Technology III (Chemistry) has
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can be synthesised by reacting 4-aminophenol in acetic anhydride and this is often the first stage of preparing a medicine. This experiment aims to prepare a sample of paracetamol and assess its quality and purity as this need to be checked before it can be formulated into a medicine. 1.2 Method 5.10g of 4- Aminophenol was suspended in water‚ in a quick fit (QF) round bottomed flask in the fume cupboard as 4 – aminophenol is toxic. Ethanoic anhydride (toxic vapor) was added and mixed by swirling and
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High Performance Liquid Chromatography Analysis of Aspirin Problem: Was aspirin (acetylsalicylic acid) successfully synthesized? Are there impurities or by-products present in the synthesized aspirin? How pure is the synthesized aspirin? Introduction: In the last experiment‚ aspirin was synthesized followed by characterization of the product using several different techniques. Melting point was a test that provided information about the identity and purity of the aspirin product. The iron(III)chloride
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Acetic acid‚ a pungent smelling colourless liquid having sour taste‚ used very commonly in the chemistry laboratories. It got its name from Latin word Acetum‚ which means vinegar. Pure acetic acid is also called glacial acetic acid‚ because in winters it freezes easily as temperature goes below 16-17°C. Therefore it looks like as if a small glacier is there in the bottle‚ hence called glacial acetic acid. Laboratory and daily life uses of acetic acid are: (i) Acetic acid is used in household kitchens
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