Chemistry and Society Paper In everyday life‚ accuracy and precision are important. These two terms are often interchanged freely‚ but these terms have key differences. Many businesses require both accurate and precise measurements to stay in business. Accuracy and Precision Accuracy refers to something that is consistent with a known value (Maze-Emery‚ 2009). Precision is the amount of detail something provides (“accuracy/precision‚” 2005). A simple analogy is someone throwing darts at
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Accuracy and Precision Laura Norwood CHM/110 October 11‚ 2012 Dr. Grant W.Wangila Accuracy and Precision Chemistry is a vibrant part of society. When experiencing some of life’s simplest of pleasures‚ there is usually a process that has undergone different aspects of what a chemist studies every day. In the text for this course‚ the example of experiencing even a simple sunset can be related to chemistry. “Molecules in the air interact with light from the sun‚ scattering away the blue
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CONCLUSION After many class lab days‚ I concluded my unknown was Calcium Carbonate due to results from the Flame Test and Anion I Test. Throughout our lab days‚ my friends would help me determine various odors and colors of the substances which allowed me to confirm my answer. Also‚ I looked select test results up on the internet to see if they matched my observations. On our first lab day‚ I received my bottle and noticed a white precipitate in the bottom therefore‚ my unknown was insoluble. I
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Questionable factors in “The Patriot” “The Patriot”‚ Is a dramatic and affectionate film depicting a determined man’s quest to annihilate British forces during the Revolutionary war with the assistance of his local militia. The film possesses various accurate characteristics such as some states offering freedom to African Americans serving in the war for a period of three years. Though the film does express appropriate scenes it does have its flaws. For instance‚ the main character Benjamin Martin
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Radical Cations•+: Generation‚ Reactivity‚ Stability R A R A MacMillan Group Meeting 4-27-11 by Anthony Casarez Three Main Modes to Generate Radical Cations Chemical oxidation D A D A Photoinduced electron transfer (PET) h! 1) D A D A* D A 2) D A h! D* A D A Electrochemical oxidation (anodic oxidation) D Anode D Chemical Oxidation Stoichiometric oxidant: SET O N Bn H N Me O N Me t-Bu
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P H A R M AC E U T I C A L application note Checking the accuracy of PERKIN-ELMER POLARIMETERS H. Stenz‚ Bodenseewerk Perkin-Elmer GmbH Abstract Quartz standards‚ sucrose solutions and optically active pure liquids are discussed as potential polarimetry standards. It is suggested to preferably use quartz standards for checking the accuracy of Perkin-Elmer polarimeters. Quartz standards are absolutely stable‚ have a high accuracy and are easy to use. For laboratories working in an environment
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Experiment # 8 Qualitative Analysis of Cations Objectives Part I: Separate a mixture of known cations: Pb2+‚ Fe3+‚ Al3+‚ Cu2+‚ and Ca2+ into individual ions. Perform a series of tests to become familiar with reactions characteristic of each cation. Part II: Separate and identify individual cations in an unknown solution containing a mixture of up to five cations. Use information gathered in part I to identify the cations. Introduction Qualitative analysis is a general name for the process
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QUALITATIVE TESTS FOR SOME CATIONS II CHEMISTRY 11.1 OCTOBER 5 2013 QUALITATIVE TESTS FOR SOME CATIONS II I. Introduction Qualitative analysis schemes are often based on selective precipitation of different cations. By carefully selecting reagents and conditions for reactions‚ groups of ions can be separated on the basis of their reactivity and the solubility of their salts. This enables the experimenter to use simple techniques with standard laboratory equipment‚ as well as to learn
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How do people view each other and what effect do relationships have on perception accuracy? I answered these broad questions by running an experiment with three trials (three different relationships) with the same controlled questions. It’s easy for one to see that perception relies heavily on how much one knows of another and how accurate it actually is. This paper will be organized by primarily discussing my acquaintance‚ Miles Morgan‚ and then my friend‚ Jack Hill‚ and lastly‚ my significant other
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LAB 3: QUALITATIVE ANALYSIS Part 2- ANIONS Sameera Feroz Butt Lab Partner: Ram Soni Thursday January 30‚ 2014 Leilani Morales CHEM1131-02 OBJECTIVE The objective of this experiment was to use qualitative analysis to determine the chemical characteristics of four known anions by systemic confirmatory testing. The chemical characteristics observed were to be used to identify an unknown sample. Sulphuric acid was to be added to a carbonate solution and an effervescent reaction would
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