INTRODUCING ESTERS This page explains what esters are and looks at their simple physical properties such as solubility and boiling points. It includes an introduction to more complicated naturally-occurring esters like animal and vegetable fats and oils. What are esters? Esters are derived from carboxylic acids. A carboxylic acid contains the -COOH group‚ and in an ester the hydrogen in this group is replaced by a hydrocarbon group of some kind. This could be an alkyl group like methyl
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Aim : To prepare an ester using reflux Hypothesis : The equation was written out for the reaction and pentyl ethanoate was predicted as being the ester that would be formed. Equipment * 10 ml pentanol | * condenser | * 10 ml glacial acetic acid | * Heating Mantel | * 1 ml conc. Sulfuric acid | * Funnel | * 50 ml flask | * 15ml 1molL-1 Na2CO3 | * Boiling chips | * Seperating Funnel | * Retort Stand | * Safety Glasses | Method 1. 10 ml of Pentanol
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Shazeda Patel 100202795 Karen Budra English 1127 April 1‚ 2013 Ester Lucero Mango “From the time I was very young‚ as long as I could remember‚ I have felt the world is magic‚ that there are two realities: one that is palpable… and the other one‚ the night reality of secrets… a lunar reality”- Isabel Allende (14 De Zapata). Isabel Allende is a Chilean woman who was raised in various locations around the world. Since her father left her when she was a child she lived with her mothers
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Cassie Essary Tim Petete Ethnic American Literature November 12‚ 2009 Angel’s Psyche in Ester Lucero One of the most fascinating aspects of any story is the formation of it’scharacters. The way the author chooses to describe them‚ give them personalities‚ is how the reader will see their lives. A character’s psyche and the way he thinks about events around him change the way a reader perceives the story. Authors have an amazing chance to shape and bend a story to fit what they want
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Microbiology-2460 Lab-003 March 31‚2008 Lab Report-Escherichia coli Abstract The purpose for this lab report was to identify and inform of an unknown bacteria that has been causing a patient to have lower abdominal and pelvic pain. To obtain the identification of this unknown bacterium‚ several biochemical tests needed to be performed in order to prescribe the correct medication to treat and cure the symptoms. Introduction In a lab today‚ I am to identify an unknown bacterium that is
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with an alkyl group‚ it becomes an ester group. “The reaction typically gives 60-70% of the maximum yield” (Staudt‚ 80). The reaction of an ester could also be reversible to make carboxylic acid and alcohol; this process is called hydrolysis. But when‚ “the base-promoted decomposition of esters yield an alcohol and a salt of the carboxylic acids; this process is called saponification”; In other words‚ it is the process of making soap (Staudt 80). Moreover‚ Esters are liquid at room temperature no
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CHM1032L pre/post lab instructions Preparation is a key to success in this lab. For this reason‚ you are required to thoroughly read through the experiment information presented in the lab manual‚ and complete a pre-lab for each experiment you do. The prelab must be completed prior to the day of the experiment. Each Friday I will ask to see your completed prelab before I allow you to enter the lab. If you have not finished the pre-lab‚ I will not allow you to enter the lab and you will receive
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Lab report is one way we used during of after an experiment in a laboratory to subtly record and discuss the experiment. During a lab‚ we sometimes can observe only the physical part of the experiment‚ or may be some visible chemical changes. These changes indicate that the experiment we do is successful or not. However‚ in order to understand and achieve more from just simply doing the experiment‚ we write lab report to more profoundly understand the internal meanings of the experiment we do‚ and
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Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal‚ procedure‚ data analysis method‚ and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report‚ a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual‚ grammatical‚ typographical
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Experiment 2: Starch Hydrolysis by Amylase Theoretical Background Polymers of carbohydrates are called polysaccharides‚ and make up some of the most important naturally occurring compounds [1]. They have thousands of monosaccharide units linked to each other by oxygen bridges. They include starch‚ glycogen‚ and cellulose‚ all three of which yield only glucose when completely hydrolyzed [2]. A B Figure 1. Starch (amylose) (A) and cellulose (B) Starch
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