Examination of Water and Wastewater 5210 BIOCHEMICAL OXYGEN DEMAND (BOD)*#(1) 5220 CHEMICAL OXYGEN DEMAND (COD)*#(2) 5220 A. Introduction Chemical oxygen demand (COD) is defined as the amount of a specified oxidant that reacts with the sample under controlled conditions. The quantity of oxidant consumed is expressed in terms of its oxygen equivalence. Because of its unique chemical properties‚ the dichromate ion (Cr2O72–) is the specified oxidant in Methods Section 5220B‚ Section
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Chemical Castration LaDarius D. Abraham Southern University A&M College Sex offenders have been a serious problem for our legal system at all levels‚ not to mention those who have been their victims. Sadly‚ many of those assaults are perpetrated by people who have already been through the correctional system only to victimize again. Sex offenders‚ as a class of criminals‚ are nine times more likely to repeat their crimes (Oakes 99). This presents a problem for the public‚ as potential victims
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Faculty of Business Administration Academic Year 2014-2015 MBA 6503 Organizational Studies Case Report: DOW CHEMICAL: INNOVATING FOR SUSTAINABILITY By Vi Nguyen Student # 3503832 Instructor: Prof. Doug Flint October‚ 2014 Background on Dow Chemical Company (Dow) Dow‚ a multinational corporation based in Midland of Michigan in the United State‚ was R&D-intensive and diversified-industry leader in chemistries‚ advanced materials‚ and agro-sciences with technology-based products and
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INTRODUCTION TO CHEMICAL BONDS CHEMICAL BOND Definition: A chemical bond is defined as a force that acts between two or more atoms to hold them together as a stable molecule. Main types of bond: 1. Ionic or electrovalent bond‚ 2. Covalent bond‚ 3. Coordinate covalent bond Forth type of bond: Metallic bond: The type of bonding which holds the atoms together in metal crystal. Valence electron: The electrons in the outer most energy level in an atom that takes part in chemical bonding
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CHEMISTRY TOPIC 11 CHEMICAL CALCULATIONS CHEMICAL CALCULATIONS INTRODUCTION The first part of this ‘Chemical Calculations’ topic will help us to work out QUANTITIES involved in a reaction; For example‚ a manufacturer might want to know‚ How much ammonia will I produce from 20 tonnes of nitrogen in the Haber Process? To do these calculations you will need to be familiar with the term Ar (relative atomic mass)‚ Mr‚ Molar mass and Mole. Relative Atomic
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proceed to discuss the characteristics and services provided by her chosen chemical dependency program. It is her belief that a substance abuser and/or addict is more likely to succeed at living a life free of alcohol and drugs when they continually attend a 12-step program‚ follow the steps‚ have a sponsor‚ a support group and educate themselves on how to live life without turning to alcohol or drugs. Of the several chemical dependency programs available‚ she chose to conduct a telephone interview
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The purpose of this experiment was used to identify the chemical changes a substance undergoes by knowing some of its chemical properties like (Change in color‚ producing bubbles and gas‚ precipitation‚ conductivity). The aim of today’s lab was to help us identify different households and their components‚ they contained whether they were acid/ base‚ because most of the households are based on those solutions like (i.e. Acetic acid = Vinegar = CH3COOH can be used in cooking) or bases solutions
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Student 11/6/12 Branch Essay Chemical Corps Chemical Corps There are many different types of branches in the United States Army. All of them serve important needs to protect the nation’s freedom. The branch that has to do with defending the nation against the threat of chemical‚ biological‚ radiological‚ and nuclear weapons and lies within the Chemical Corps of the United States. This is important because rise of weapons of mass destruction has skyrocketed in the past 15
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Chemical Warfare I. Introduction Does it seem like you can’t keep up the way you use to four years ago? Do you get easily frustrated than you use too. Than I am here to inform you about Chemical Warfare. We explore this topic by finding out “what is Chemical Warfare. Next we will explain and understand how Chemical Warfare works. Last we will discuss how to protect against Chemical Warfare. Use II. What is Chemical Warfare? A. Definition of Chemical Warfare Chemical Warfare? B. Types of Chemical
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Victoria Chemicals: The Merseyside Project Executive Summary Victoria Chemicals is facing pressures from investors to improve its financial performances. The plant manager is currently considering whether to accept a GBP 12million initial outlay project to renovate its polypropylene production line at Merseyside plant. The benefit of the plant is the lower energy requirement of production and a greater manufacturing capacity. This report consist a recommendation for the plant manager which consists
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