Using the Iodine clock method to find the order of a reaction Introduction When peroxodisulfate (VI) ions and iodide ions react together in solution they form sulfate (VI) ions and iodide. This reaction is shown below: S2O82-aq+ 2I-aq SO42-aq+ I2(aq) The reactants and the sulfate (VI) ions are colourless however the Iodine is a yellow/brown colour. This allows you to measure the progress of the reaction through the colour change when the iodine is produced. In order to determine the order of
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Economics 8-2013 Testing for Multiple Bubbles 1: Historical Episodes of Exuberance and Collapse in the S&P 500 Peter C. B. Phillips Singapore Management University‚ peterphillips@smu.edu.sg Shu-Ping SHI Jun Yu Singapore Management University‚ yujun@smu.edu.sg Follow this and additional works at: http://ink.library.smu.edu.sg/soe_research Part of the Economics Commons Citation Phillips‚ Peter C. B.; SHI‚ Shu-Ping; and Yu‚ Jun. Testing for Multiple Bubbles 1: Historical Episodes of
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Issue of multiple directorships has recently came to public concern. It becomes more and more common that directors in listed companies retaining multiple directorships and even some legislators are involved. This situation is popular in Hong Kong and Singapore‚ however‚ many directors in United States are usually involved in one company only. There are serval problems in exercising multiple directorships to listed companies. First‚ director may not meet his function diligently. With regard to
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A multiple birth is when the mother delivers two or more offspring. Since 1980 the multiple offspring birthrate has increased by over 75%. in general multiple births have more complications then a normal one offspring birth. Many new things come into play when the mother is carrying multiple children. Not only is it harder on the mothers body‚ but the babies are also sharing a space and nutrients. There are multiple short- term complications of multiple births like: pre-eclampsia‚ and diabetes. Both
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The waterfall method is one of the main planning techniques for a project. It is very important for every project to be planned well. If a project manager does not plan every part of the project before starting the project‚ failure is almost certain. The waterfall method is one of the simplest planning methods for software projects‚ or any project for that matter. It is comprised of five main phases where “the output of each phase becomes the input for the next.” 1 These phases are Analysis‚ Design
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Howard Gardner’s Theory of Multiple Intelligences “An intelligence is the ability to solve problems‚ or to create products‚ that are valued within one or more cultural settings.” -- Howard Gardner FRAMES OF MIND (1983) Verbal-Linguistic Intelligence (“word smart” or “book smart”) This intelligence involves the knowing which comes through language; through reading‚ writing‚ and speaking. It involves understanding the order and meaning of words in both speech and writing and how to properly use
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M What is multiple sclerosis is a disease that affects the brain and spinal cord resulting in loss of muscle control‚ vision‚ balance‚ and sensation. In the U.S. one in 1‚000 people have MS. Did you know that there are four types of MS. The first one is Relapsing/remitting multiple sclerosis in which the patient has relapses or episodes of the disease. Slightly over 80% of those suffering from multiple sclerosis begin with this type. The second one is Secondary progressive MS usually a second stage
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Multiple myeloma Multiple myeloma (also plasma cell myeloma also known as MM‚ myeloma‚ plasma cell myeloma‚ or as Kahler’s disease) is a progressive hematologic (blood) disease. It is a cancer of the plasma cell‚ an important part of the immune system that produces immunoglobulins (antibodies) to help fight infection and disease. The immune system is made up of several types of cells that work together to fight infections. Lymph cells (called lymphocytes) are the main type of cell in the adaptive
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OBJECTIVE: * To determine the molecular weight of a volatile liquid by using Dumas method. METHOD: MATERIAL | CHEMICALS | 125 mL Erlenmeyer flask | Known liquid (2-propanol) | Rubber band | Unknown liquid | Boiling chips | | Watch glass | | 100 mL graduated cylinder | | Pin | | 600 mL beaker | | Hot plate | | Thermometer | | Room temperature water | | 6 × 6 and 8 × 8 aluminium foil | | PROCEDURE: SAFETY * Lab Coat and Safety Goggles. * Keep the bottles
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Subject: Chemistry SL Title: Preparation of a salt (lead iodide) by using precipitation method. Aim: To produce 1.50 g of lead iodide‚ PbI2‚ assuming 100 % conversion‚ using 1.00 g solid potassium iodide‚ KI‚ and 0.1 M lead nitrate‚ Pb(NO3)2 solution of volume 30 cm3 and hence calculate percentage yield. Calculations: 2KI(s) + Pb(NO3)2( aq) —> PbI2 (s) + 2KNO3 (aq) Mass of PbI2 to be produced = 1.5 g Moles of PbI2 = = 0.003 Moles of KI = 0.003*2 = 0.006 Mass of KI = 0.006*166 = 1.00 g
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