Experiment 3 Preparation of 2‚ 4-Dinitrodiphenylamine Courtney Elahee Claim: The evidence will show that the red solid collected after recrystallization from the nucleophilic aromatic substitution of 2‚ 4-dinitrobromobenzene and aniline has the characteristics of 2‚ 4-dinitrodiphenylamine. Evidence: The procedure was carried out as described by Ault1 and the lab manual2. 2‚4-dinitrobromobenzene (0.92g‚ 3.75mmol‚ pale yellow solid) and aniline (0.7mL‚ 0.7g‚ 7.5 mmol) were boiled in ethanol (10mL)
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Educational Preparation There is an ongoing debate about nurses trained at the Associates Degree level versus the baccalaureate degree level. In this paper‚ I will discuss some of the important differences between the two levels of education and try to determine if one is really better than the other. First of all‚ when considering the difference between the two types of degrees‚ it is important to recognize that at either level‚ a nurse must be able to pass the same NCLEX examination
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ABSTRACT The extraction of pectin from orange peels has been studied at different sample to solvent ratios‚ different PHs and with different extraction techniques using water. The amount of pectin extracted reduces as the PH increased. This research work is been carried out in order to determine the process condition that will result in high yield of pectin and residual oil extracted from orange peels using the methanol pre-treatment to extract orange peel oil and hydrochloric acid for pectin
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Experiment 2 Date: 24 January 2006 Title : Crystallization of a Crude Sample Objective : Preparation of pure diphenyl via crystallization of crude diphenyl dissolved in ethanol. Structural Formula of Organic Substances Involved : Diphenyl Ethanol Apparatus : Round-bottom flask (100 mL)‚ measuring cylinder (50 mL)‚ conical flask (50 mL)‚ filter flask‚ beaker (100 mL)‚ stemless glass funnel‚ Hirsch funnel‚ capillary tube‚ long glass tube‚ watch glass‚ glass vial‚ water condenser
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Peter Principle = You will rise to your level of incompetence and stay there. Why managers Fail - Need to develop others = problems with interpersonal relationships‚ building an effective team - Diversify your portfolio of talents and contacts = dependency on a single skill; limited human capital; depend on a single mentor; limited social capital - Respond to and lead change = failed to follow through or persuade others. Difficulty in making transitions Leadership is the capacity to motivate
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Getting started on your essay Before you start writing an essay‚ you need to decide three things. What are you writing about? Who do you imagine will be reading your essay? What do you want to tell them? A popular kind of essay is to offer your reader an opinion or argument. You can write a successful essay by starting off with a plan. The key to doing a successful essay is to break the writing down into short‚ simple steps. Pre-writing for your essay Begin by brainstorming. Brainstorming
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Hi Guys‚ IBPS PO Exam‚ is one of the toughest exam in Banking sector unless you practice a lot. As all we know it consists of Numerical Aptitude‚ mental Ability‚ English and General Awareness (mostly banking) and Computer Awareness. Coming to Aptitude and Reasoning‚ I suggest you to glue with single standard book whatever you have and complete it before going for other source. Almost every book will have same models with 85% redundancy‚ so if you finish one book means‚ you covered 85% of syllabus
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Estimating Price Elasticities with Theory-Based Priors Author(s): Alan L. Montgomery and Peter E. Rossi Source: Journal of Marketing Research‚ Vol. 36‚ No. 4‚ (Nov.‚ 1999)‚ pp. 413-423 Published by: American Marketing Association Stable URL: http://www.jstor.org/stable/3151997 Accessed: 22/07/2008 16:25 Your use of the JSTOR archive indicates your acceptance of JSTOR ’s Terms and Conditions of Use‚ available at http://www.jstor.org/page/info/about/policies/terms.jsp. JSTOR ’s Terms and Conditions
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the substitution of a proton with a functional group. The electrophilic aromatic substitution reaction nitration is used to nitrate methyl benzoate and acetanilide with a nitronium ion. Crystallization was used to purify the product. The melting point was used to determine its purity and the regiochemistry of the products. The methyl benzoate reaction product‚ methyl nitrobenzoate‚ was determined to be meta-substituted and the acetanilide reaction product‚ nitroacetanilide‚ was determined to be para-substituted
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Preparation of Synthetic Banana Oil Introduction: In this lab the synthesis‚ purification‚ and characterization of isoamyl acetate‚ or banana oil‚ was determined. The synthesis was completed by a reversible esterification reaction which required the heating of glacial acetic acid and isoamyl alcohol‚ combined with a sulfuric acid catalyst in hexane. In order to increase the efficiency of the reaction‚ LeChatelier’s Principle is utilized by removing water from the products. As a result‚ the reaction
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