Laboratory II Professor Jerry Sheinbeim January 28 – February 28‚ 2014 ABSTRACT The observed reaction that took place in this experiment was the de-esterification of ethyl benzoate to form benzoic acid. This experiment was used to determine the rate constant k of the synthesis of benzoic acid at different temperatures and ethanol concentrations. The reaction was carried out in a batch reactor‚ where ethyl benzoate was added to a mixture of water‚ ethanol‚ and sodium hydroxide. The agitation
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CARIBBEAN EXAMINATIONS COUNCIL Caribbean Advanced Proficiency Examination CAPE ® CHEMISTRY SYLLABUS Unit 1 - effective for examinations from May/June 2007 Unit 2 - effective for examinations from May/June 2008 CXC A11/U2/06 Published by the Caribbean Examinations Council All rights reserved. No part of this publication may be reproduced‚ stored in a retrieval system‚ or transmitted in any form‚ or by any means electronic‚ photocopying‚ recording or otherwise without prior permission
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reactor depending on the nature of the feed materials and products. One of the most important we need to know in the various chemical reaction was the rate of the reaction. By studying the saponification reaction of ethyl acetate and sodium hydroxide to form sodium acetate in a batch and in a continuous stirred tank reactor‚ we can evaluate the rate data needed to design a production scale reactor. A stirred tank reactor (STR) may be operated either as a batch reactor or as a steady state flow
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Directions: Answer the questions below. Make sure to show your work when applicable. 1. Solve the absolute value equation. Check your solutions. | 5x + 13| = –7 5x + 13 = -7 5x = -20 X = -4 2. Simplify the expression below. 6n2 - 5n2 + 7n2 6 – 5 + 7 = 8 =8n2 3. The total cost for 8 bracelets‚ including shipping was $54. The shipping charge was $6. Write an equation that models the cost of each bracelet. 8 x + 6 = 54 $8.00 each bracelets 4. The total cost for 8 bracelets
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The Triathlon Equation Those who are interested in doing the triathlon often do not know how to do their training effectively. First you must build a base. This means you must start with endurance only a few times a week‚ progressing to 6 days a week with one rest day. You should only do 1 activity a day‚ with 1 brick workout a week. A brick workout simulates what it feels like to do two of the activities back to back so that it is easier come race day. Brick examples include: 1.) swim 300m
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Development of an Equation Maggie Purpose: Investigate a chemical reaction using lab procedures and observations. Then‚ find a pattern of reactivity and explain the findings using a chemical equation and particle diagram. Procedure: Refer to: Department of Chemistry‚ The Ohio State University. "Development of an Equation." General Chemistry 1210 Laboratory Manual. Vol. 2013-2014. Plymouth: Hayden-McNeil. 32-35. Data/Results: Part A: In the potassium iodide solution‚ I think there were potassium
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shows practical problems as a series of mathematical equations which can be manipulated to find the optimum or best solution. Blending is a graphical approach to linear programming which deals with resource allocation subject to constraints. It is a model which assists firms in deciding the best possible utilisation of limited resources. Each resource constraint is represented as a mathematical linear equation. A linear expression is an equation which links two variables‚ and if plotted on a graph
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Marble Chip Investigation Method 1.Set up the equipment as diagram shows. The measuring cylinder must be filled with water and then inverted into the tub. 2.Measure the quantity of hydrochloric acid and marble chips to the decided amount. Add water to the acid to change the concentration to what you need. 3.Take note of the amount of water in the measuring cylinder. 4.Put the marble chips and hydrochloric acid into the conical flask. Replace the bung and start the stopwatch. 5.Once the decided
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‘98 1. Solve the following problem related to the solubility equilibria of some metal hydroxides in aqueous solution. (a) The solubility of Cu(OH)2(s) is 1.72 x10–6 g/100. mL of solution at 25° C. (i) Write the balanced chemical equation for the dissociation of Cu(OH)2(s) in aqueous solution. Cu(OH)2 Cu 2+ + 2 OH – (ii) Calculate the solubility (in mol/L) of Cu(OH)2 at 25 °C. (1.72 x10–6 g/0.100 L)(1 mol/97.5 g) = 1.76 x10–7 mol/L (iii) Calculate the value
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Name __________________ Pendulum Go to http://phet.colorado.edu/simulations/sims.php?sim=Pendulum_Lab and click on Run Now. 1. Research to find equations that would help you find g using a pendulum. Design an experiment and test your design using Moon and Jupiter. Write your procedure in a paragraph that another student could use to verify your results. Show your data‚ graphs‚ and calculations that support your strategy. The time it takes a pendulum to complete
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