SYNTHESIS OF THE PHARMACEUTICAL ASPIRIN (ACETYLSALICYLIC ACID) AIM: The aim for this experiment was to synthesise a small amount of aspirin with salicylic acid as the starting product and sulphuric acid as the catalyst. The product obtained from this reaction will be impure and will need to be purified. This will be done by 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
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FOUNDATION IN SCIENCE INTRODUCTION TO PRACTICAL ORGANIC CHEMISTRY – MAKING AND PURIFYING ORGANIC COMPOUNDS Stage 1 – Deciding how much reagent to use Most organic reactions do not go to completion; most reach an equilibrium position with significant quantities of reactants still remaining. In addition‚ separating the desired product from the rest of the reaction mixture‚ and then purifying it‚ will result in the loss of more of the product. The amount of product obtained expressed as a percentage
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Synthesis of Aspirin and Tylenol Kyla Wykoff Abstract Aspirin and Tylenol were synthesized by means of crystallization‚ recrystallization‚ and melting point determination. Synthesis produced significantly high percent yields for aspirin‚ however‚ produced extremely low and impure percent yields for Tylenol. A second group was also used to compare results and errors‚ in which they too were also producing extremely low percent yields of Tylenol. Therefore‚ error was based on the specific protocol
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Preparation and Recrystallisation of Aspirin Contents Page Synopsis iii 1 Introduction 1 1.1 Objective 1 1.2 Background 1 2 Theory 1 3 Procedure 2 3.1 Materials 2 3.2 Preparation 2 3.3 Recrystallisation 3 3.4 Determination of Melting Point 3 4 Results and Calculation 4 4.1 Mass 4 4.2 Percent yield 4 4.3 Melting Point 4 4.4 Appearance 4 5 Discussion 5
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crystals 95% ethanol Clear colorless liquid Acetyl chloride Clear colorless liquid with gas escaping from container FeCl3 Clear colorless liquid Commercial aspirin Fine powdery white solid crystals I2/KI Deep black liquid KMnO4 Brownish liquid Phosphoric acid Clear colorless liquid Table 2. Preparation of Aspirin. Description Salicylic acid + Acetyl chloride Cloudy white liquid with undissolved white powder Mixture at room temp White cloudy liquid Mixture in ice bath
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The spectrophotometer is an essential tool for biologists and chemists in analyzing chemical and biological samples. Gaining familiarity with its operating protocols and understanding what its outputs mean are very important in the development of lab technique for students of cell biology. This experiment will help laboratory students gain experience in using the spectrophotometer. Basic Laws of Light Absorption - For a uniform absorbing medium (solution: solvent and solute molecules that absorb
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1. The standard curve is a graph that shows a relationship between concentration and absorbance of a solution. A standard curve was experimentally created in this experiment using 10mL solutions of phenol red with concentrations 10µM‚ 7.5 µM‚ 5.0 µM and 2.5 µM then the absorbance of each sample was measured using a spectrophotometer. This generated curve with resulting average absorbances of 1.273nm‚ 1.0275nm‚ 0.585nm‚ 0.285nm and 0.124nm provided a means to determine the phenol red concentrations
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If someone was assigned to compile a video of clips that would make me cringe‚ they would come up with something similar to The Purity Myth. The clips used were reminders of the oppressive‚ heteronormative‚ misogynistic system that I grew up in. The film itself provides ample examples of the ways in which women’s sexualities are policed‚ the idealization of virginity‚ the shortcomings of abstinence only sex education‚ and the arguments against women’s reproductive health. I have never been envious
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and Recrystallization of Aspirin Preparation and Recrystallization of Aspirin Date of the experiment: 9 May 2013 Date of submission: 23 May 2012 Date of the experiment: 9 May 2013 Date of submission: 23 May 2012 Synopsis 1. General Objective: To familiarize with the preparation of some simple organic compound and purify the compound by recrystallization. Specific Objective: The experiment is carried out to: 1.1 Conduct the synthesis of aspirin 1.2 Reinforce the
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the Percentage of 2-ethanoylhydroxybenzoic Acid in an Aspirin Tablet Introduction and Aim: An Aspirin tablet is an analgesic; therefore the purpose is to relieve pain and due to it also being an antipyretic its other tenacity is to lower the body temperature. An experiment was carried out on the basis of calculating the percentage of 2-ethanoylhydroxybenzoic Acid in aspirin tablets hence 4 commercial tablets were taken to determine its purity using a known volume of standard sodium hydroxide‚ due
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