Chemical Reactions and their Classifications 26 October 2012 Abstract: Ordinary laboratory ware was used to determine how many of what type of chemical reactions occurred. This yielded three decomposition reactions‚ four substitution reactions‚ and three metathesis reactions. Introduction There are many different types of chemical reactions in the study of chemistry; A composition reaction (also known as synthesis) is defined as the reaction that occurs when two single compounds combine in
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Redox Reaction Lab Practical Luis Suarez and Lukyon Mendrin CHEM 1A Lab‚ Department of Chemistry‚ California State University‚ Fresno‚ CA 93740 Lsuarez054@mail.fresnostate.edu April 13‚ 2016 In This experiment we used potassium permanganate (KMnO4) as our titrant and our titrand was oxalic acid (H2C2O4● 2H2O). The objective of the experiment was to titrate the solutions to determine the molarity of potassium permanganate. We had to dilute the stock solutions to a specific molarity for the experiment
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Indigo Synthesis Author: Carolina Morales Group #1 Lab Partners: Jennifer Capeloto‚ Samantha Hoffman and Adriana Garibay Instructor: Saehan Park Chem. 152‚ Section 43 Date Work Performed: February 10‚ 2010 Date Work Submitted: February 24‚ 2010 Abstract: The percent yield of the color Indigo that is the color of blue jeans for the three trials was determined to be 13.50%‚ 15.30% and 14.80%. A series of experiments were performed to a cloth dye comparison. The absorbance
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CHECK LIST 1. Is an external wall within 900mm of an allotment boundary to another property‚ 1.8m to another building that isn’t a class 10 building‚ or 3m from a brush fence? 2. If so‚ these walls must have a non-combustible roof lining and eve lining. 3.Windows in these walls must be non-operable fire windows (exceptions for bathroom toilet or laundry windows with an area smaller than 1.2m2 4.Doors must be self closing and solid core not less than 35mm 5. Are there any encroachments between the
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added 5 drops of 3M NaCl to the unknown solution‚ we had some precipitate‚ we centrifuge and then we divided to two test tubes‚ and they were put in hot water and got confirmatory tested. The Ag+ appeared to be in the solution because it melted‚ however Pb2+ didn’t. With the rest of the solution we added Na2SO4 we had precipitate which means I had Ba2+and we centrifuge it to do confirmatory test by adding K2CiO4 and the result was the precipitate was yellow. After then I added 3M of NH3 to raise the
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Absorption Spectroscopy Author: Lab Partners: Instructor: Chem 152 Date Work Performed: Date Work Submitted: Abstract A Beer’s Law analysis was used to determine the molar absorptivity of a Red-40 food dye. Using a spectrometer‚ the best wavelength to use for the analysis of this dye was determined to be 501nm. A series of dilutions were performed and the concentrations were calculated to find ‘E‚’ the molar absorptivity‚ which was determined to be 18035 M-1 cm-1. Introduction
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Methods: Sampling for the fouling community was taken at Bodega harbor during low tide. The main dock constituted as the transect for which measurements were taken. Quadrats were placed along the main dock‚ quadrats used in this experiment were .3m x .3m. In total there
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Waste Minimization Techniques Mike Lancaster Green Chemistry Network Waste Treatment Cost of Waste PREVENT TREAT & DISPOSE DISPOSE Cost of Waste Legislation 1900 2000 1 Waste Minimization Techniques • • • • Prevention is better than cure Get it right at the R&D stage Chemists do not have all the answers! The answer lies within a multi-disciplinary team – – – – – chemists chemical engineers production business health‚ safety‚ environment specialists
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PAHANG TRIAL 2009 EXAMINATION CHEMISTRY PAPER 2 MARKING SCHEMES SECTION A - Structural Questions: Question 1. (a) (i) The presence of isotopes 1M (ii) Let the abundance of 63X be a %. The % abundance of 65X. = ( 100 – a ) 1M Relative atomic mass = ( 62.93 x a) + ( 64.93 x ( 100 -a) ) 1M
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MediShield. I am sure many would welcome this. But it will inevitably lead to over-consumption. We need a carefully considered‚ and calibrated approach. Remember that after government subsidies‚ we have our 3Ms – Medisave‚ MediShield and Medifund‚ to help defray our medical expenses. The 3Ms allow us to first look after ourselves and our families through savings (Medisave). The second line of defence is the pooling of risks to pay for larger bills (MediShield). And if all else fails‚ to tap on the
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