will measure the required amount of Zinc (Zn) on a weighing scale‚ again for precise accuracy. I will then measure the starting temperature using a thermometer. Next I will pour the Zinc into the test tube containing CuSO4. 3.Finally I will measure the final temperature using a thermometer and record the temperature rise in °c. (I will carry out all my experiments under lab safety precautions.) Variables *I will vary the mass of Zinc‚ & use the following Zinc weights: 0.5g‚ 1g‚ 1.5g‚ 2g and 2.5g
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determination of copper‚ zinc and lead by adsorptive stripping voltammetry in the presence of Morin E. Shams a‚∗ ‚ A. Babaei b ‚ M. Soltaninezhad b a Institute for Advanced Studies in Basic Sciences‚ Zanjan 45195-159‚ Iran b Department of Chemistry‚ Arak University‚ Arak‚ Iran Received 24 November 2002; received in revised form 5 September 2003; accepted 15 September 2003 Abstract A sensitive and selective method for the simultaneous determination of copper‚ zinc and lead is presented. The
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SYNTHESIS OF ZINC OXIDE NANO PARTICLES IMPLEMENTED IN DYESENSITISED SOLAR CELLS Sunya Pratyutpana‚ Sahithya Kandalam‚ R. Aarthi and Fozia Z. Haque* 3rd year‚ B.Tech‚ MANIT Bhopal. * Asst. Prof. Department of Physics‚ MANIT Bhopal. april.sunya@gmail.com sahithya08@gmail.com r.aarthi04@gmail.com ABSTRACT: The vital component of Dye-sensitized solar cells are the nanorods which not only provide a high surface area for electron transport‚ but the monocrystalline arrays ensure the rapid collection
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Food and Chemical Toxicology 45 (2007) 1650–1661 www.elsevier.com/locate/foodchemtox A comparison of chemical‚ antioxidant and antimicrobial studies of cinnamon leaf and bark volatile oils‚ oleoresins and their constituents q Gurdip Singh b a‚* ‚ Sumitra Maurya a‚1 ‚ M.P. deLampasona b‚ Cesar A.N. Catalan b a Chemistry Department‚ DDU Gorakhpur University‚ Gorakhpur 273 009‚ India Instituto de Quimica Organica‚ Universidad Nacional de Tucuman‚ Ayacucho 471‚ S.M. de Tucuman
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Calculating the Enthalpy Change of Reaction for the Displacement Reaction between Zinc and Aqueous Copper Sulphate Data Collection and Processing Observations: * Drops of water left on the inside of the measuring cylinder * Hole in the lid‚ possible escape route for gas or splash-back * The polystyrene cup felt warm during the reaction By extrapolating the graph we can estimate what the rise in temperature would have been if the reaction had taken place instantaneously. I can
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EXPERIMENT 1: Aim: To range the metals copper‚ lead‚ silver and zinc together with hydrogen. Start with the strongest reducing agent. Hypothesis: The nobler a metal is‚ the worse reducing agent. Apparatus/requirements: Sandpaper‚ strips of; zinc‚ lead‚ silver and copper‚ solutions containing aqueous; Zn2+‚ Pb2+‚ Cu2+ and Ag+ ions (0.2 M)‚ hydrochloric acid (5.0 M)‚ emery paper‚ test-tubes. Method: Burnish the three metal strips to get a shiny surface‚ after drop a drop of each of the metal
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Gravimetric Analysis of Galvanized Steel Purpose The goal of this lab is to determine the thickness of the coating of zinc on galvanized steel using the mass and volume of a sample of galvanized steel‚ and by using a larger mass; it is possible to minimize percent uncertainty. Reactions Molecular: Complete Ionic: Net Ionic: Oxidation Half Reaction: Reduction Half Reaction: Data and Calculations Density of Zinc: Density: Specifications of Galvanized
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Oxygen (O) Human beings obtain this element from the air. It enters a person’s bloodstream through the lungs. The blood carries oxygen to the cells of the body. In the cells‚ oxygen combines with chemicals obtained from food. Energy produced during this process makes it possible for each cell to perform its function in the body. Also‚ oxygen atoms are present in water and water is essential to all life. It is present in many organic compounds. While oxygen is necessary for life‚ oxygen as ozone
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References: 1. Nielsen‚ S. Suzanne. Food Analysis. Third ed. New York:Kluwer Academic/ Plenum Publisher‚ 105-110 (2003). 2. Pomeranz Y.‚and Meloan Cliffton E. Food Analysis: Theory and Practice. Third ed. New York: Chapman & Hall‚ 602-624 (2000). 3. Tee E Siong‚ Mohd Ismail Noor‚ Mohd Nasir Azudin‚ Khatijah Idris. (1997). Nutrient Composition of Malaysian
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Food Analysis * Concerned with development of criteria of quality and identity… * Process in w/c sample is treated in a series of steps Importance: 1. It’s necessary in the dev’t and enforcement in standard of identity‚ purity and feel of processed food products. 2. It can provide studies design to improve and control the quality of natural processed food. 3. Can help in the determination of the composition of products in their normal and abnormal storage conditions. Methods
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