REPORT 4 PREPARATION OF ALUM FROM ALUMINUM METAL Huy Nguyen October 2nd‚ 2012 The objective of the laboratory is to synthesize alum (KAl(SO4)2.xH2O) from aluminum powder and to determine the proportion of water in the alum crystals. Alum is a product from the reaction between potassium hydroxide and sulfuric acid. The reaction include several steps‚ as followed: Aluminum powder reacts with potassium hydroxide to generate Al(OH)4- ions and release hydrogen. 2 Al(s) + 2 KOH(aq) + 6
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practitioners in Hong Kong. Personnel Review 37 (1)‚ 66–84. Oreg‚ S.‚ 2003. Resistance to change: developing an individual differences measure. Journal of Applied Psychology 88 (4)‚ 680–693. Oreg‚ S.‚ Vakola‚ M.‚ Armenakis‚ A.‚ 2011. Change recipients’ reactions to organizational change: a 60-year review of quantitative studies. The Journal of
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Lab #3: Ion Exchange Chromatography Objective The purpose of this experiment was to separate proteins on the basis of their net charge at a particular pH. In cation exchange chromatography positively charged molecules are attracted to a negatively charged column. Conversely‚ in anion exchange chromatography‚ negatively charged molecules are attracted to a positively charged column. Experimental results could be monitored in a predictable way by controlling running pH‚ salt concentration‚ and by
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Quarter 1 In quarter we allocated sales peoples salaries‚ bonuses‚ quotas and market share basing on the following information. Bob Being oldest and most experienced of all the five sales people‚ we offered him a higher salary and high target for the quarter because basing on his experience he was capable of meeting the quota and he deserved the salary. Bob needed a higher salary so as to keep him motivated and thank him for being with the company for that long. Emily She was the best sales
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The table below breaks down the economic value in use of the CMI pads according to both the Colerick and Fazio tests. I used the data from each case to derive the number of hours of driving required to complete the job with both the asbestos and CMI pads. The difference in time to complete the job multiplied by the cost per real hours was one part of the economic value in use. The other portion was the cost of the asbestos pads for each project. Colerick Test Feet driven 15000 Hours Cost per
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Aldol In this preparative lab‚ an aldol (trans-p-anisalacetophenone) was produced from the reaction between p-anisaldehyde and acetophenone with the presence sodium hydroxide. The reaction also showed the importance of an enolate and the role it played in the mechanism. Sodium hydroxide acts as a catalyst in this experiment and is chosen because of its basic conditions and pH. The acetophenone carries an alpha hydrogen that has a pKa between 18 and 20. This alpha hydrogen is acidic because of its
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McKinsey Working Papers on Risk‚ Number 39 Commodity trading at a strategic crossroad Jan Ascher Paul Laszlo Guillaume Quiviger December 2012 © Copyright 2012 McKinsey & Company 2 Contents Commodity trading at a strategic crossroad Introduction and executive summary1 Changes in global commodity trading: Three trends 2 Imperatives for commodity traders 6 Conclusion8 McKinsey Working Papers on Risk presents McKinsey’s best current thinking on risk and risk
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With the introduction of the theme of struggle and determination‚ come great stories. The human race takes pride in what they have accomplished throughout their existence. As they are highly regarded for their accomplishments‚ they leave a legacy that will never be taken for granted. Ernest Hemingway’s The Old Man and The Sea‚ highlights those key components of struggle and determination. The protagonist‚ Santiago prevailed even in times of hardships and doubts; as a result‚ he was highly regarded
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Jackson2 1 Family and Community Health Research Group‚ School of Nursing and Midwifery‚ University of Western Sydney‚ and 2Faculty of Nursing‚ Midwifery and Health‚ University of Technology‚ Sydney‚ New South Wales‚ Australia ABSTRACT: In this qualitative study‚ the experiences of a small cohort of registered nurses (RN) during the first 2 years of mental health employment were documented. A total of 13 semistructured interviews were completed from within a specialist mental health setting. Eleven
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Determination of Chlorine and Iodine in Water I. Introduction The purpose of this laboratory was to determine the amount of chlorine and iodine in a sample of water by titration using a starch indicator and to standardize a sodium thiosulfate solution. Chlorine is added to municipal water supplies to purify it enough to become safe to drink. Iodine is also added to water when people camp or go hiking in the back country where they cannot bring purified water along. Chlorine and iodine are
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