p. 1 Megan Ly Chemistry 231L February 20‚ 2013 SOLUBILITY Purpose: To better comprehend solubility behavior by investigating the solubility of various substances in different solvents‚ looking at miscible and immiscible pairs of liquids‚ and observing the solubility of organic acids and bases. Reference:
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Thin Layer Chromatography/ Paper Chromatography Lab # 10 11/26 Sample # 32 for TLC Sample # 1 for Paper Introduction: Chromatography is one of the most important separation techniques used in all fields of chemistry ranging from analytical chemists to pharmacists. The understanding of how chromatography works and how to operate instruments used to carry out the procedures is an important lab technique to learn. Experiment: Thin Layer Chromatography. Lab #10-1 Paper Chromatography
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“UNSAFE DRINKING WATER” An adequate supply of safe drinking water is one of the major prerequisites for a healthy life‚ but waterborne disease is still a major cause of death in many parts of the world‚ particularly in children‚ and it is also a significant economic constraint in many subsistence economies. The basis on which drinking water safety is judged is national standards or international guidelines. The most important of these are the WHO Guidelines for Drinking Water Quality. The quality
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INTRODUCTION 3 2.1 The background information of Aspirin 3 2.11 History 3 2.12 chemical structures 4 2.2 The background information of Acetaminophen 5 2.21 History 5 2.22 Chemical Structures 6 3.0 BODY 6 3.1 Synthesis 6 3.11 Synthesis of Aspirin 6 3.12 Synthesis of Acetaminophen 7 3.2 Mechanism of Action in Human Body 9 3.2.1 Pain as a warning system 9 3.2.2 Aspirin 9 3.2.3 Acetaminophen 10 3.3 Side effects 10 3.3.1 Side effects of Aspirin 10 3.3.2 Side effects of Acetaminophen 11 4
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describe the functioning of Aspirin in our body‚ its various properties to fight pain‚ and its evolution over the years. Littlejohn describes how Aspirin claimed celebrity status as one of the world’s most popular‚ inexpensive painkillers by relieving headaches‚ sprains‚ blows‚ burns‚ swelling and fever. Furthermore‚ she added that Aspirin could also be used to reduce the risk of stroke and heart attack. The author supports the main idea by describing how the aspirin when taken with a modest stream
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Contents 1.0 Abstract Acetaminophen and aspirin are both well-known drugs that relieve pain and reduce fever. This report looks at acetaminophen as a potential substitute for a patient who is allergic to aspirin. Acetaminophen‚ a common analgesic drug that can be bought over the counter‚ was synthesised by Hormon Northrop Morse. With acetaminophen consisting of a benzene ring‚ an amide and an alcohol group‚ it has the ability to stop pain and reduce fevers. However‚ due to the state of technology
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Freezing-Point Depression to Find Molecular Weight Abstract: In this lab‚ the purpose was to use the freezing point depression method to determine the molecular weight of aspirin. This was done by determining the freezing of t-butanol and that of a t-butanol and aspirin solution; then finding the molality of the solution‚ and moles of aspirin. In the results of the experiment‚ the molar mass was found to be 192.2 g/mol‚ which differed from the established value of 180.2 g/mol by 6.7% error. Introduction:
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Anhydride Figure 11.3. The balanced chemical reaction of the formation of aspirin. Because the reaction is slow in pure acetic anhydride‚ the catalyst‚ commonly strong acids like phosphoric acid was used for the reaction. According to Le Chatelier’s principle‚ the presence of excess acetic anhydride forces the equilibrium towards the desired product‚ which in this case is the aspirin. In addition to this‚ the catalysts were also used to ensure that side reactions‚ which may
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BMS3021 – Research Topic: Aspirin TOPIC SUMMARY Aspirin is able to inhibit the synthesis of the Thromboxane A2 precursor‚ by irreversibly binding to the COX-1 enzyme Lack of Thromboxane A2 means that there is no signalling for platelet aggregation so there is no blood clot formation‚ leading to its ability to act as a ‘blood thinner‘ SALT found that in a low-dose of 75mg of Aspirin a day‚ secondary prophylaxis of new cardiovascular events were reduced by 16-20% By decreasing the daily dose to 75mg
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Synthesis of Aspirin Ling Tecson Gamido‚ Mitchiko Mariel M. Mizukami Abstract Acetylsalicylic acid‚ or also known as aspirin is known to be a drug that relives people of pain and is commonly used even today. It is synthesized from salicylic acid and ethanoic anhydride‚ both of small quantities. Phosphoric acid was used as a catalyst in the synthesis to speed up the process. Esterification is involved and the final product is aspirin with the presence of acetic acid as the byproduct. In order
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