How does a catalyst in the form of a metal ion affect the rate of reaction in an iodide clock reaction with potassium peroxydisulphate ions? Background When peroxydisulfate ions (S2O82-) react with iodide ions (I-) in the presence of a starch indicator‚ they produce a dark blue solution. Reaction (1) S2O82- + 3I- I3- + 2 SO42- (peroxydisulfate ion) (iodide ion) (iodine ion) (sulfate ion) To determine the rate law for this reaction a series of changes
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Many advanced high school and college chemistry students perform an experiment known as the "iodine-clock" reaction‚ in which hydrogen peroxide reacts with iodide to form iodine‚ and the iodine subsequently reacts with thiosulfate ion until the thiosulfate has been consumed. At that point‚ the reaction solutions turn blue in the presence of starch. The experiment helps students understand the fundamentals of chemical kinetics --- the speeds at which reactions take place. 1. Activation Energy
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Analysis The 13 Clocks is a fairy tale told by a twentieth century author. Its themes are clearly statements about the moral concerns of the time and perhaps are intended more for adults than for children‚ even though James Thurber used the form of a child’s story. One of the story’s meanings is that a true life is in a way being like a child. Adults responded to Thurber’s message: The book sold well‚ going into nine printings. Thurber had earlier written fairy tales for children as well as
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PRICING STRATEGIES Global pricing is one of the most critical and complex issues that McDonald’s faces since price is the only marketing mix instruments that create revenues while all other elements entail costs. A multinational company such as McDonald’s also faces the challenges of how to coordinate their pricing across different countries because of the fact that a company’s global pricing policy may make or break its overseas expansion efforts. In this case‚ McDonald’s is using Value-Pricing
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Informative Interview with Mrs. Bowman What kind of hours do you typically work? Quote: “I would say that I typically work around forty to forty five hours a week. As a Psychiatrist‚ you may have to work overtime and longer than expected. At many times I have experienced my plans that are apart from my work being canceled. I have learned that you must have an open schedule.” What types of people experience the greatest success in the Psychology/Medical field? Quote: “People who experience the
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The History of Clocks | |The history of clocks is very long‚ and there have been many different types of clocks over the centuries. Not all historians agree on the history of the clock. The word clock was first used in the 14th century (about 700 years ago). It comes from the word for bell in Latin ("clocca"). Using the Sun The first way that people could tell the time was by looking at the sun as it crossed the sky. When the sun was directly overhead in the sky‚ it was the middle of the day‚ or
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learned in the class. Our case study that we picked talked about the clocks and how the society shaped the way of measuring time throughout history. The clock nowadays are technology that has been taken for granted. The focus of this case study is to show the importance of time measurement and how our life nowadays revolves around it. By going through history all the way from using the sun and stars to the development of clocks that neither lose nor gain one second in 200 million years to show how
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Title New strategies for FMCG companies Author Source References sreekanth reddy‚ MBA II Mktg Forthright 1. Marketing Management‚ Phillip Kotler 2. site.securities.com 3. FT.com 4. The Economist 5. www.wikipedia.org Document Type Secondary Analysis Subject Date Abstract The FMCG sector is undergoing a slow but definite change towards higher productivity gains in spite of decreasing retail prices. In this scenario it is important for the companies to innovate‚ use economies of scale and
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Sample Marketing Plan Template by Entrepreneur Media SA (Pty Ltd) For marketing advice‚ visit: http://www.entrepreneurmag.co.za/category/advice/marketing/ Sample marketing plan template Table of Contents 1) Executive summary Page # 2) Situation analysis Page # Page #
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1. COMPANY’S BACKGROUND Standard Chartered Bank was formed in 1969 through the merger of two separate banks‚ the Standard Bank of British South Africa and the Chartered Bank of India‚ Australia and China. The Chartered Bank The Chartered Bank was founded by James Wilson following the grant of a Royal Charter by Queen Victoria in 1853. The bank opened in Mumbai (Bombay)‚ Kolkata and Shanghai in 1858‚ followed by Hong Kong and Singapore in 1859. The traditional trade was in cotton from Mumbai
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