the primary method for purifying solid organic compounds through the differences in solubility at different temperatures. In this experiment‚ a suitable solvent was first determined. Acetanilide was produced by acetylation of aniline with acetic anhydride. The crude acetanilide was dissolved in a solvent in a heating water bath. The hot solution was filtered and the filtrate‚ cooled slowly in an ice bath as crystals started forming out. As the compound crystallizes from the solution‚ molecules of other
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Santo Tomas Manila‚ Philippines ABSTRACT This experiment involved three steps: synthesis of aspirin‚ isolation and purification‚ and the estimation of purity of the final product. The synthesis involved the reaction of salicylic acid and acetic anhydride in the presence of a catalyst‚ phosphoric acid‚ H3PO4. When the aspirin was prepared‚ it was isolated and filtered. The percentage yield of the synthesis was calculated to be 78.42%. The experimental melting point range of aspirin was determined
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this experiment was to separate Toluene and Hexane by distillation and gas chromatography based on their difference in boiling points. The boiling point of hexane is 69 degrees Celsius and the boiling point of toluene is 110 degrees Celsius. Three fractions were collected for both simple and fractional distillation. The first fraction was hexane since it had the lower boiling point. The second fraction was a mixture of toluene and hexane. The third fraction was toluene since it had the high boiling
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chemical reaction between functional groups of a diisocyanate and a Polyol. First developed in late 1930s‚ polyurethanes are some of the most versatile polymers. The diisocyanate can either be aliphatic‚ (hexamethylene diisocyanate) or aromatic like toluene diisocyanate. Examples of diols are ethylene glycol or even polyethylene glycols‚ with greater Mr. Synthetic polymers‚ like polyurethane‚ are produced by reacting monomers in a reaction vessel. In order to produce polyurethane‚ a step also known
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left for their trusted maid servants. Apart from ensuring that the President’s suits have been nicely pressed‚ the First Lady will also be expected to accompany her husband during certain state functions of which she is required to. However‚ as Bill Alder reveals‚ the White House is not just a place to sit back‚ relax‚ watch TV and wait for Mr. President to come back
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POLYMER DATA HANDBOOK *Home *Browse/Search Contents *Browse by Polymer Class *Browse the Index *Online help Copyright © 1999 by Oxford University Press‚ Inc. EDITED BY JAMES E. MARK‚ UNIVERSITY OF CINCINNATI PUBLISHED BY OXFORD UNIVERSITY PRESS The online version of the Polymer Data Handbook includes key data on over two hundred polymers. Please note that entries are presented as PDF files and can only be read using Adobe Acrobat Reader Version 3. If you do not have the freeware reader‚
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1997 – 2006: A Report to the American Can cer Society. 1998. 12 Feb. 2007. . "Hydrogen Cyanide." Wikipedia: The Free Encyclopedia. 2007. 20 Feb. 2007. . "Toxic Emissions Statement: Top 6 Toxins." Canadian Health Network. 2005. 12 Feb. 2007. . "Toluene." Wikipedia: The Free Encyclopedia. 2007. 20 Feb. 2007. . "What Are Common Uses of Cigarette Smoke Ingredients?" Canadian Health Network. 2005. 12 Feb. 2007. .
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CHEM 2204 Chromatography Lab by wyk.wong » Fri Jul 11‚ 2014 10:25 am Results and Calculations Rf values Rf=(Distance moved by the spot (cm))/(Distance moved by the solvent front (cm)) Toluene: Rf=2 cm/3.8 cm=0.53 (Fluorenone) Rf=1.1 cm/3.8 cm=0.29 (Fluorene) Hexane: Rf=1.8 cm/2.2 cm=0.82 (Fluorene) Rf=0 cm/2.2 cm=0 (Fluorene Table 1: Experimental IR peaks compared to literature IR peaks for fluorenone Functional group Experimental peak (cm-1) Literature peak (cm-1) C-H 3010.5 3013
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Organic Chemistry I LAB EXAM: FINAL BROMINATION OF BENZENE SYNTHESIS AND PURIFICATION OF BROMOBENZENE: PROCEDURE DATA TABLE Chemical Boiling point C Melting Point C Density g/mL Solubility Benzene 80.1 5.5 0.88 Slightly in H2O Toluene 110.6 -93 0.87 Slightly in H2O Bromobenzene 155-156 -30.8 1.50 Insoluble Dibromobenzene 220.40 87.31 0.96 Insoluble MATERIALS: Graduated cylinder Weight scale Buchner funnel Filter flask Rubber stopper Hot plate Thermometer Conical funnel Various
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What is huffing? The intentional breathing of gas or vapors with the purpose of reaching a high. What does huffing do to the brain? Changes the electrical activity of the brain. On a elecroencephalograpghy‚ (or EEG) the brain will show up as sharp impulses. What toxic effects and the "risks" that occur with this practice on the body. The brain: changes the electrical activity within the brain‚ possibly resulting in hallucinations and convulsions. Also the center of emotional behavior
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