Safety Precautions for Synthesis of Acetic Anhydride Acetic Anhydride Acetic anhydride is an irritant and also flammable‚ therefore gloves and goggles should be worn at all times during the experiment. It is reactive to water‚ so in the case of fire‚ alcohol foam or carbon dioxide is preferred to use as an extinguisher. This chemical has harmful fumes and use of a fume hood is strongly recommended. Sulphuric and Salicylic Acid These acids may irritate the skin in high concentrations. Take
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industrial settings due to the simplified synthesis and safety parameters of the overall reaction. Both benzoic acid and methanol are relatively cheap to obtain from a commercial source as well as being easy to store with a relatively long shelf life. The Fischer esterification method is a fundamental and important synthesis process in training our future chemists in both commercial and academic employment and principles. By utilizing this method of synthesis‚ the chemist has the knowledge to utilize
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second time I make one of these essays and as a person who has experienced an AP course I am thrilled to express what I have accomplished and the objectives I want to attain for my future in AP. Before entering my first AP Class there was only a feeling of fright and a part of me was ready to bail so I could run back to the normal classes. However‚ now that I look back I am glad that I did not run away. Due to the Pre-AP and AP course that is offered by the school I was capable of achieving more than
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Microwave Synthesis of 5‚10‚15‚20- Tetraphenylporphyrin Abstract: In this green chemistry experiment of 5‚10‚15‚20-tetraphenylporphyrin was synthesized from benzaldehyde and pyrrole. using microwave irradiation to heat the reactants.‚ The liquid reactants are absorbed on a solid support‚ silica gel‚ which acts as a Lewis acid catalyst to facilitate the reaction. The reaction forms a porphyrinogen‚ which is then oxidized to the porphyrin product by atmospheric oxygen. Column chromatography is performed
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AP U.S. History and AP English Language and Composition AP AMERICAN STUDIES Course description: This course examines the development of the American character and culture through the study of history‚ literature‚ art‚ music‚ and film. This integrated approach to the literary‚ political‚ social‚ and economic patterns of our past and present develops in the students the capacity to work critically‚ independently‚ and collaboratively. This course satisfies the requirements of AP U.S.
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solution‚ CaCl2(s)‚ xylene‚ t-butyl peroxybenzoate‚ methanol‚ 5% aqueous solution of 1‚ 6-hexanediamine‚ NaOH(s)‚ 5% sebacoyl chloride in hexane‚ glacial acetic acid‚ concentrated H2SO4‚ cotton balls‚ acetic anhydride‚ CH2Cl2 Procedure: For the synthesis of polystyrene‚ 10 ml styrene and 20 ml of 1 M NaOH solution was placed in separatory funnel and they were shaked for several times. Aqueous layer was discarded. The styrene layer was washed with water and dried with CaCl2(s). The styrene was placed
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CHAPTER ONE THE NATURE AND METHOD OF ECONOMICS CHAPTER OVERVIEW This chapter begins with a discussion of the meaning and importance of economics. In this first chapter‚ however‚ we will not plunge into problems and issues; instead we consider some important preliminaries. We first look at the economic perspective—how economists think about problems. Next‚ we state some of the benefits of studying economics. Then‚ we examine the specific methods economists use to examine economic behavior and the
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8/27 Memory Chapter Summary Memory 6.1 What are the three processes of memory and the different model of how memory works? Memory can be defined as an active system that receives information from the senses‚ organizes and alters it as it stores it away‚ and then retrieves the information from storage. The three process are: Encoding Storage Retrieval Models of Memory In the levels-of-processing model of memory‚ information that gets more deeply processed is more likely to be remembered
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Change Over Time Writing assignment: From 5‚000 BCE to 600 BCE‚ the politics of Mesopotamia shifted from a religiously-led nation‚ to a secular nation due to the replacement of hunting and gathering for food‚ with agriculture. In 5‚000 BCE‚ Mesopotamia was settled by the Sumerians‚ who built the main framework for the Mesopotamian Civilization. Mesopotamia is located between the Tigris and Euphrates Rivers‚ which is what made it an excellent place for growing crops. This change in lifestyle sparked
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105. Why is the beginning of a president’s term considered to be the “honeymoon” phase? The beginning of a presidents term is considered to be the honeymoon phase because generally when a newly elected president takes office‚ the opposing party will not be politically critical of him or her about 100 days. 106. Describe factors that often cause a president to have positive public opinion poll figures Some factors would be depending on the condition of the economy and how many money is
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