Complexometric Determination of Water Hardness By Nick Williams CHM 152 Lab dates: Aug 28th 2013 Dr. Weide Abstract: When a polyatomic ligand with multiple lone pairs of electrons available for bonding to a central metal ion forms a complex with a metal ion‚ a process known as chelation takes place. Metal ion impurities can be found by using disodium salt of EDTA to determine the concentration of M2+ by complexometric or chelometric titration. Erichrome Black T makes it easy to see
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CHM 096 TUTORIAL 2 (Chemical Equilibrium) Jan 2013 1. Write the equilibrium constant expression‚ Kc‚ for each of the following reactions: a) b) c) d) e) f) 2NO(g) + O2(g) ⇄ 2NO2(g) The decomposition of solid potassium chlorate to solid potassium chloride and oxygen gas. 4HCl(g) + O2(g) ⇄ 2H2O(g) + 2Cl2(g) 2NO2(g) + 7H2(g) ⇄ 4H2O(l) + 2NH3(g) H2O(g) + C(s) ⇄ CO(g) + H2(g) The reduction of solid copper (II) oxide with hydrogen gas to produce copper metal and water at o 500 C. 2H2(g) + O2(g)
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Measurement of the Heat of Neutralization of an Acid CHM 152IN CRN: February 5‚ 2000 I. Purpose of Experiment The purpose of this lab is to measure the heat released in the reaction of an acid and a base. This will demonstrate an enthalpy reaction‚ showing energy being released. II. Chemicals and Equipment The following chemicals and equipment will be utilized for the experiment: |Chemicals |Equipment
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Internal assessment worksheet. • Andrew Allot and David Mindoff – Biology Course Companion • http://www.rsc.org/education/teachers/learnnet/cfb/images/07A.jpg • http://www.rsc.org/education/teachers/learnnet/cfb/enzymes.htm • http://www.elmhurst.edu/~chm/vchembook/571lockkey.html • http://www.poolcenter.com/blog-enzymes-in-pools.jpg ----------------------- |ENZYME EXPERIMENT |What is the effect of different temperatures on the number of oxygen bubbles produced in a potato during enzymatic | | |reaction
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24/05/2013 Commerce CHM 1046 General Chemistry II Dr. Michael Blaber Electrochemistry Commercial Voltaic Cells Voltaic cells provide a convenient‚ safe and portable supply of electrical energy. The Industrial Revolution marked the development of heat engines‚ and other devices‚ that utilized the energy released from combustion reactions in the form of heat The Digital Age (Electronic Revolution?) revolves around devices that require energy in the form of electrical energy. Such devices
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Title: Economic situations for Tesco in the UK and China To: From: Date: 08/11/12 Procedure: to describe the influence of two economic environments on business activities within a selected organisation. Also to compare the challenges to selected business activities within a selected organisation in different economic sectors. This report will consist of information about the economy in the countries. China and UK. Also there will be information about Tesco in both of these countries and why is
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1) What are the characteristics of Late Gothic painting‚ as represented by Duccio‚ Cimabue‚ and Giotto? Describe at least 3 works‚ including artist‚ approximate dates‚ subject‚ medium‚ style‚ location‚ etc. In what ways was Giotto groundbreaking? Late Gothic painting is best characterized by a movement away from the Byzantine style‚ including a use of depth and a focus on Naturalism‚ or a use of subjects that were not based in the spiritual world. Widely regarded as one of the forefathers of
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A nine-year-old boy is brought into a clinic suspected of having a hypo- gonadism disorder. The physician ordered a test of the boys free testosterone after having considered this was the best option compared to testing the total testosterone. The test results came back at 25.0pg/ml reference range 0.1-3.2pg/ml flagged as high for the boy. Several months later a repeated test showed 28.0pg/ml reference range of 50-210pg/ml adult reference range flagged as high. Our paper will go into detail of how
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Abstract The aim of this study was to test the rate of reactivity of the enzyme catalase on hydrogen peroxide while subject to different concentrations of an inhibitor. The hypothesis was that hydrogen peroxide will be broken down by catalase into hydrogen and oxygen‚ where a higher concentration of inhibitor will yield less oxygen‚ resultant of a lower rate of reaction. Crushed potato samples of equal weight were placed in hydrogen peroxide solutions of various temperatures. The results showed
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(6) To develop skills necessary in writing a scientific report. Prerequisites (1) Completion of two semesters of college-level basic biology (BSC 2010/2010L and BSC 2011/2011L‚ or equivalents); two semesters of college-level basic chemistry (CHM 1045 and CHM 1046 or equivalents); and one semester of any college-level mathematics‚ physics‚ or statistics course. (2) A cumulative GPA of at least 2.75 in the five courses listed above. These requirements WILL NOT BE WAIVED for students who pass majors
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