Compleximetric Determination of Water Hardness Caindec‚ Patricia Ysabel B. Water hardness is a measure of the amount of calcium and magnesium carbonate dissolved as Ca 2+ and Mg 2+ in water. There are no health hazards associated with water hardness‚ however‚ it causes scaling‚ as well as forming of soap suds. Compleximetric titration is one of the best ways of measuring total water hardness using a standard ethylenediaminetetraacetic acid (EDTA) solution. EDTA solution is used as it has the
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Heat of Neutralization Introduction: The purpose of this experiment was to measure‚ using a calorimeter‚ the energy changes accompanying neutralization reactions. In order to measure the amount of heat produced by a reaction‚ an instrument called a calorimeter was used. The calorimeter used in this experiment was somewhat rudimentary. It was constructed as shown in the following picture: After finding the heat capacity of the calorimeter‚ the student and partner neutralized two acids and
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Organic Lab I No. 5-6 Separation of a Carboxylic Acid‚ a Phenol‚ and a Neutral Substance (Two-week lab) Reading Assignment 1) Chapter 7 • Introduction: P. 135- first paragraph • Theory and Techniques (p142-145) o Properties of Extraction Solvents o Mixing and Separating the Layers o Drying Agents o Part 1: The Technique of Neutral Liquid/Liquid Extraction The description is for dichloromethane-aqueous
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ChemActivity 10: Exercises 1. Draw a complete mechanism including the intermediate and most likely product for the reaction of each alkene below with H-X. H + H Cl + Cl Cl + + Br H Br H I Br + H I H + I H 2. Draw a complete mechanism of each pair of reactant including any favorable rearrangements and all important resonance structures of all intermediates. Reactant Pair 1 Cl H Br 1 + Cl No shift stable benzylic carbocation H: shift H H Br
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Christina Hang Vanessa Hang Seng Xiong Period 5 December 14‚ 2012 Molecular Mass by Freezing Point Depression Objective: Determine the molecular mass of an unknown substance by finding the change in freezing point of a solvent when the unknown substance is dissolved in it. Qualitative Data: Trials BHT (g) Cetyl –Alcohol (g) Unknown substance (g) Melting Temperature 1 0.48 g 0 0 69.3 2 0.46 g 0.09 g 0 66.9 3 0.49 g 0 0.11 g 53.7 Analysis: 1.) Determine ___ for the solution of cetyl
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Exercise 1. What safety equipment is available to you while you do your experiments? How far are they from you while you are conducting your experiments? This includes fire extinguishers‚ phones‚ showers‚ etc. The safety equipment that I have access to while performing my experiments are as follows; shower‚ fire alarms and a telephone. They are all within ten feet from where the experiment will take place. 2. What is an MSDS? MSDS is a document that is required by Osha’s “Hazard
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Case: Donner Company EXECUTIVE SUMMARY The Donner Company is a manufacturer of printed circuit boards. They need to address several issues in their supply chain operations to improve their service level because net income in the month of September has drastically decreased. Before September‚ growth was steadily increasing every month. They found that the major problems include unpredictable bottlenecks in manufacturing‚ lower than expected productivity and lower than expected quality
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to look into the Regina Company case using the perspective of a financial analyst who will report to the Electrolux management and board. This decision was due to the following reasons: 1. Any further audit from the side of Regina‚ Electrolux or the SEC will only yield a similar result as the last audit thus being redundant and utterly useless 2. Looking at the case in the perspective of a member of the board of Regina will prove to be useless in evaluating the case since we will have no more
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The Company Fine Fettle Herbal Shop provides affordable health products to people of Depoe Bay‚ Lincoln City‚ and Newport‚ Oregon. Fine Fettle Herbal Shop is an LLC located in Depoe Bay‚ Oregon. The shop will be apart of the Food (Health) Supplement Stores industry. The Food (Health) Supplement Store industry is expected to grow 2.3% in 2015 (McKenna‚ 2015). The Company’s Mission Fine Fettle Herbal Shop’s mission is to provide affordable health to the people of Depoe Bay‚ Lincoln City‚ and Newport
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Kristen’s Cookie Company Here is the Process Flow Diagram: The whole process throughput time of making a dozen of cookies is 26 minutes. It takes washing‚ mixing and spooning 8 minutes to make a dozen of cookies. And preparation and bake time totally are 10 minutes. The final step of cooling‚ packing and accepting payment of cookies takes roommate 8 minutes to finish the cycle. Assume the night capacity is 4 hours‚ so Kristen and roommate have 240 minutes operating time. Since the oven only
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