"Chemical substance" Essays and Research Papers

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    effectiveness at mass annihilation. Two of those weapons include chemical and biological weapons. These weapons are constructed solely to kill mass populations in the quickest amount of time as possible. Their most startling aspect is the cruelty in which lives are extinguished and brutalized. However‚ these two weapons are latently different. The definition of a chemical weapon is a weapon that uses any amount of toxic properties or chemical substances and that is intended to kill as an act of war. Biological

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    Isolation of Aspirin

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    Once the aspirin is prepared‚ it is isolated from the reaction solution and then it is purified. The aspirin is insoluble in cold water‚ and it is isolated by filtering the chilled reaction solution. Purification is essential to remove any unreacted salicylic acid and acetic anhydride as well as the acetic acid product and phosphoric acid. Acetic anhydride is caused to decompose by the addition of water once the formation of aspirin is complete. C4H6O3 (Acetic anhydride) + H2O (Water) ------------------------->

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    Chemical Reactions Lab

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    The Sequence of Chemical Reactions Drew Selfridge Dave Allen‚ Lab partner Instructor Yang February 11‚ 1997 INTRODUCTION This experiment was to recover the most amount of copper after it is subjected to a sequence of reactions. The copper is originally in solid form‚ but the reactions will turn it into free Cu+2 ions floating in solution. The ions will then be regrouped to form solid copper once again. During this process‚ however‚ some of the Cu+2 ions may be lost. The copper will subjected

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    Introduction: A chemical reaction involves the breaking and forming of bonds in order to create the necessary energy required to cause movement. Each reaction is catalyzed (an increase in rate because of a present catalyst) by a specific enzyme. Enzymes are able to denature proteins‚ meaning that a protein loses its original shape by uncoiling‚ giving it a random‚ unstructured shape. The pineapple plant contains bromelain which‚ because of its unique characteristics‚ keeps gelatin from thickening

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    While the text states that taking "drugs won’t enhance creativity"‚ I disagree‚ because for one‚ some of our best music comes from the major drug using era known as the 60’s‚ 70’s‚ & 80’s. All joking aside‚ I mainly just disagree with this statement in particular because I think it could have been worded a bit differently and really define what they mean by a “drug” especially because I think addiction affects everyone. What people think about when they see the word can be anything (usually derived

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    positioning of the side chain. The reaction is as follows: Finally purification of the structure of the unknown oxidized component‚ its structure shall be determined by obtaining the melting point and by means of IR spectroscopy of the original substance. Experimental The experiment was carried out following the procedure described in Experiment 24 of the assigned lab book (Lehman 188-195) with some deviation: When it was time to use the condenser the first time around‚ the tubes for the water

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    Mahlaqua Imran Chemical and Physical Changes Lab 09/09/13 I. Purpose: Identify the different changes as a physical change or a chemical change.  II. Safety: You may need safety goggles and gloves.  III. Pre-lab questions:  1. Identify the following as either chemical or physical changes:  a. Striking a match Chemical b. Food spoiling  Chemical c. Breaking a glass  Physical d. Mowing the grass  Physical

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    Unknown Mixture

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    boiling point for test tube five was applied to test tube six because the substance is the same‚ so the boiling point should be the same as well. Any time the fume hood was opened during the distillation period‚ there were fluctuations in the temperature; the longer the fume hood remained open‚ the larger the fluctuation would be. The temperature fluctuations may have contributed to the presence of ketone in the first substance. Vapor of 2-heptanone would have gone up and condensed through with the

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    Lab Eight: Identification of HydrocarbonsWebGoogle+GmailDocsmore ▼ All DocsEdit Orgo Chem Lab 8 Lab Eight: Identification of Hydrocarbons Organic Chemistry 311 Abstract: Unknown hydrocarbon K was identified by using purification‚ determination of boiling point by using the capillary tube technique‚ the calculation of density and obtained refractive index value from the Abbe-3L refractometer. The density was not useful due to an error of the machine but the boiling point and refractive index

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    Chemical Reactions Lab Report Introduction: Chemical reactions is a process that involves rearrangement of the molecular or ionic structure of a substance. There are different types of reaction such synthesis‚ decomposition‚ single replacement‚ double replacement‚ and combustion. Synthesis is where two or more reactants combine to create a product. For Decomposition‚ it is the opposite where a product breaks down into reactants. In Single Replacement‚ reactants switches an element with another element

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