in the presence of small quantities of starch and sodium thiosulfate solutions. As the iodine molecules are produced they immediately react with the thiosulfate ions and are converted back to iodide ions: I2(aq) + 2S2O32⁻(aq) → 2I⁻(aq) + S4O62⁻(aq) During this period the reaction mixture remains colourless. But once the thiosulfate ions have been used up‚ a blue/black colour suddenly appears because the iodine molecules now get the chance to react with the starch. A series of experiments will be
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Introduction The purpose of this experiment is to determine the rate equation for the “Iodine Clock Reaction” experiment. The experiment will consider the equations 〖2I〗^-+S_2 O_8→2〖〖SO〗_4〗^(2-)+I_2 and I_2+2〖S_2 O_3〗^(2-)→2I^-+S_4 O_6 in order to determine the rate law of Rate=k[〖〖S_2 O_8〗^(2-)]〗^a 〖[I^-]〗^b by using the experimental data to calculate the values of exponents a and b as well as the rate constant k. Experimental Supplies Needed: 250 mL Erlenmeyer flask‚ 100 mL beaker‚ graduated
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Experiment 16: Kinetics: The Iodine Clock Jane Smith Purpose: The objective of this experiment was for students to apply their knowledge of kinetics and rate laws in order to determine the rate of a chemical reactions‚ activation energy‚ and frequency factors of those reactions. Specifically‚ this experiment was performed using a series of solutions with varying concentrations of KI‚ Na2S2O3‚ and (NH4)2S2O3 . Students recorded time elapsed to observe physical evidence of a reaction taking place
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DETERMINATION OF SAPONIFICATION AND IODINE NUMBERS OF SOME LIPIDS A.L. ASCANO1 C.V. OPONDA1 1INSTITUTE OF BIOLOGY UNIVERSITY OF THE PHILIPPINES‚ DILIMAN‚ QUEZON CITY‚ PHILIPPINES DATE PERFORMED: FEBRUARY 19‚ 2013 INSTRUCTOR’S NAME: FRANCESCA N. BELTRAN _____________________________________________________________________________________ ABSTRACT _____________________________________________________________________________________ INTRODUCTION Lipids are long aliphatic hydrocarbon chains
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a Global Economy ECCO A/S – Global Value Chain Management Question 1: 1. Relate the Ecco case to the conceptualization of the organization as a global factory. What similarities and dissimilarities with the global factory conceptualization do you see and what solutions may it present? Similarities: As ECCO had been very successful in the footwear industry by focusing on production technology and assuring quality by maintaining full control of the entire value chain‚ ECCO grew and faced
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It was originally hypothesised that the reaction time would decrease with higher concentrations of the reactants‚ potassium iodate and sodium bisulfite as collision theory stated that more molecules present in a given volume meant a greater chance they would collide. Furthermore‚ the time was expected to decrease with higher temperatures as it influenced the reactant particles by raising their kinetic energy. However‚ the data collected from this experiment only partially supported this hypothesis
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Michael Porter’s Value Chain History of Value Chain • Popularized by Michael Porter’s book best seller “Competitive • • Advantage” 1985 Creator of “5 Forces model” Helped Gereffi in the late 1990s develop Global Value Chain. Michael Porter’s Background • Born May 23‚ 1947 in Ann Arbor‚ Michigan • Received MBA in 1971 Harvard Business School • Competition and company strategy • 6 time winner of the McKinsey Award Value • The Value is the extent to which a good or service is perceived by
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Case 4-2 : ECCO A/S – Global Value Chain Management. ECCO is a worldwide company acting on the market of the shoes manufacturing. It has been created for more than 40 years and is one of the leaders of the market. The company key point in his product is the quality with a combine production: manual and machinery‚ a production of their leather made in-house and a unique direct injection technology. With this different assets the firm aimed to become the producer of the world’s most comfortable
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This experiment was a Landolt Iodine clock reaction - Oxidation of Bisulphite by Iodate. It involved conducting three measured experiments. The first variable tested was concencentration. This was tested by conducting two experiments‚ each varying the concentration of either the NaHSO3 or KIO3. The varying of NaHSO3 involved using 0.1 Molar of KIO3 against decreasing concentrations of NaHSO3 (0.25 M‚ 0.125 M‚ 0.0625 M and 0.03125 M). When decreasing the concentration of KIO3‚ 0.25 M of NaHSO3 was
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Method Acting and 1950’s American Politics and Culture Throughout the twentieth century‚ method acting had been experimented with and practiced in the United States. The method had derived from Stanislavski’s "system" at the Moscow Art Theatre and was then given its own identity by method pioneers in the Group Theatre‚ Lee Strasberg‚ Stella Adler and Elia Kazan. Through the early 1900’s‚ the method had begun to gain recognition in American theatre‚ but swiftly attained considerable prominence on
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