acidification of salicylic acid and acetic anhydride. The objective was to convert a specific amount of salicylic acid into the same amount of aspirin that was high in purity. Furthermore‚ the other objectives were to enable students to conduct the synthesis of aspirin‚ reinforce skills or recrystallisation and the technique of melting point determination. The amount of each compound should be the same because there is a 1:1 ratio between them. The purity of the synthesized aspirin was measured by determining
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Sarah Khan Bivins-5th April 20th‚ 2013 Protein Synthesis Every day‚ you take in an abundance of different biomolecules; one of them being proteins. Have you ever wondered how proteins are made? They don’t just grow from a tree or fall from the sky‚ they are made through a process called protein synthesis. Protein synthesis is broken up in two two steps: transcription and translation. Transcription starts inside the nucleus when the DNA is unzipped by helicase. Following that‚ the mRNA nucleotides
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INTRODUCTION The culture of Malaysia draws on the varied cultures of the different people of Malaysia. The first people to live in the area were indigenous tribes that still remain they were followed by the Malays‚ who moved there from mainland Asia in ancient times. Chinese and Indian cultural influences made their mark when trade began with those countries‚ and increased with immigration to Malaysia. Other cultures that heavily influenced that of Malaysia include Persian‚ Arabic‚ and British.
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it has been pronounced”. The only ground for a void marriage which may apply on the facts is if Norman and Deirdre failed to observe certain legal formalities required for a valid marriage . More information is needed on what formalities‚ were observed at wedding. However on the facts we are aware that the marriage ceremony took place in a registry office‚ as a result the marriage must comply with certain legal requirements. The marriage must have been solemnised under the authority of a superintendent
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English 101 Marriage People tend to think of marriage as a tradition that unites two people towards a common goal of happiness. They make a promise to love each other and create a family. The married couples always have a special bond that unites them and share common goals. Every culture has its own definition of marriage‚ and they all have their own way of celebrating it with their traditions and customs. But universally marriage is a union‚ an agreement between two people‚ and a set
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Marriages in Arranged Type An arranged marriage is a marriage that is at some level arranged by some or the other than those being married and is usually used to describe a marriage which involves the parents of the married couple to varying degrees‚ it has deep roots in royal and aristocratic families around the world. Today‚ arranged marriage is largely practiced in Africa‚ theMiddle East‚ and Southeast Asia and East Asia to some extent. Some times people suppose there is no diffrentce between
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Sucrose Synthesis by D. DeWitt‚ PhD v1.5 11/10/12 Introduction | Condensation Reaction | Plant Synthesis | A. Introduction Although it might seem straight forward‚ the synthesis of sucrose‚ either as a simple condensation reaction (a.k.a. dehydration synthesis)‚ or what actually happens in plants is complicated. Before we explore sucrose’s creation‚ let’s take a look at its structure. In Figure 1‚ the space-filling model is pretty but rather useless at this point in our journey. We
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Synthesis of Aspirin Name: Xuanyi Li Teaching assistant: Deirdre Zwilling November 15‚ 2009 Purpose: To synthesize aspirin‚ a common analgesic drug‚ via nucleophilic acid-catalyzed substitution reaction of salicyclic acid with acetic anhydride. The whole reaction is catalyzed by phosphoric acid. (The experiment involved three parts: The synthesis of aspirin‚ the isolation and purification of aspirin‚ and the estimation of the purity of the final product.) [pic] Procedure[1]: A mixture
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Synthesis of Aspirin Learning Goals 1. To synthesize aspirin from salicylic acid and acetic anhydride. 2. To purify the crude product by Recrystallization. Introduction Most drugs are chemical compounds which are described as "organic compounds" because they are comprised primarily of the elements carbon‚ hydrogen and oxygen. The present experiment will be the synthesis of a familiar organic compound called aspirin. The common chemical name is acetylsalicylic acid. Aspirin‚ the
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Jeana Greaves Chem3301-112 June 19‚ 2013 Synthesis of Aspirin from Methyl Salicylate Introduction The synthesis of Aspirin (Acetyl Salicyclic Acid) began with methyl salicylate and sodium hydroxide as the reagent. The polar oxygen accepts the electrons from now positively charged hydrogen. The positively charged sodium disassociates leaving the hydroxide ion with a negative Scheme 1 shows the mechanisms that were demonstrated during the synthesis of Aspirin. charge that attracts to the positively
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