What is the effect of a non-volatile impurity on the boiling point of a substance? of a volatile impurity? A non volatile impurity which is added to the volatile liquid‚ it’s boiling point will increase. It is due to some of effective surface area which is available for evoperation is occupied by non volatile substance. If another volatile impurity is added then 1) if it does not chemically react with given liquid then boiling point will decreade due to increase in vapour pressure. 2) if it chemically
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------------------------------------------------- Application of Statistical Concepts in the Determination of Weight Variation in Samples Maria Catherine C. Cabrera Institute of Chemistry‚ University of the Philippines‚ Diliman‚ Quezon City June 19‚ 2013 ------------------------------------------------- June 26‚ 201 ------------------------------------------------- Abstract In this experiment‚ different statistical concepts; such as Q-test‚ Mean‚ Standard Deviation‚ Range‚ and Confidence interval
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The VSEPR Model 10.33 Predict the shape or geometry of the following mole- cules‚ using the VSEPR model. a. SiF4 b. SF2 c. COF2 d. PCl3 10.34 Use the electron-pair repulsion model to predict the geometry of the following molecules: a. GeCl2 b. NF3 c. SCl2 d. XeO4 10.35 Predict the geometry of the following ions‚ using the electron-pair repulsion model. a. ClO3? b. PO43? c. SCN? d. H3O? 10.36 Use the VSEPR model to predict the geometry of the fol- lowing ions: a. N3? b. BH4? c. SO32? d. NO2
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A prominent Anglo-indian‚ Derozio played a major role in introducing western attitudes into Indian intellectual life. He taught literature and history at Hindu College‚ Calcutta and was perhaps the first nationalist poet of modern India. Drawing inspiration from French Revolution‚ he inspired his pupils to think freely and rationally‚ question all authority‚ oppose meaningless customs and traditions. He started a discussion group—the Academic Association—to enable interaction amongst students. He
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have a higher melting point the heat needed to break down the bonds between the compounds is much higher than not needing to break down any bonds at all. Do ionic compounds conduct electricity as: (3 points) Link: http://antoine.frostburg.edu/chem/senese/101/compounds/faq/print-properties-ionic-vs-covalent.shtml Solids? No Liquids? Yes Aqueous solutions (when the ionic compounds are dissolved in water)? Yes Do covalent compounds conduct electricity as: (3 points) Solids? no
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Chemistry 211 Organic Chemistry I Bilal R. Kaafarani www.bilalkaafarani.com bilal.kaafarani@aub.edu.lb Office: 416 Chemistry O.H.: 2:00-3:20 PM‚ MW Chem 211 B. R. Kaafarani 1 Lectures Chapter 1 2 3 7 4&8 5 6 9 10 11 12 Chem 211 Material covered Structure Determines Properties Alkanes & Cycloalkanes: Introduction to Hydrocarbons Alkanes & Cycloalkanes: Conformations and cistrans Stereoisomers Stereochemistry Alcohols & Alkyl Halides. Nucleophilic Substitution Structure & Preparation
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C H EM 301A - O rganic Chem istry L ecture N otes © Dr. Peter de Lijser‚ 2011 Introduction – Welcome to O-chem! “What is Organic Chemistry?” Organic chemistry is the chemistry of Carbon. “Why is Organic Chemistry Important for me?” Organic Chemistry is the central science for many other fields: • Medicine/Pharmacy: • Biochemistry: • Industrial Applications: • Reaction Mechanisms: What do "Organic Chemists" do? • Discover new reactions • Improve old reactions
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Post Lab Report Experiment 3 - Chromatography – Analyzing Analgesics by TLC and Isolation of β–Carotene by Column Chromatography Chemicals 1. Acetaminophen (C8H9NO2) 2. Aspirin (C9H8O4) 3. Caffeine (C8H10N4O2) 4. Ibuprofen (C13hH18O2) Introduction In this experiment‚ several analgesics were analyzed by Thin Layer Chromatography (TLC) and the composition of an unknown tablet was identified. We define chromatography as the separation of two or more compounds or ions by
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Chem 107 HW 8 (16‚ 26‚ 32‚ 38) 16. Determine how much energy is released or required for the reaction shown. Is this reaction exothermic or endothermic? CO2 + 2 H2O → CH4 + 2 O2 This reaction is endothermic 26. Why can’t we digest fiber? We cannot digest fiber because we lack the enzyme capable of breaking the sugar linkages in cellulose. 32. Why is unsaturated fat considered much healthier than saturated or trans fat? Unsaturated fat provides benefits of fat in the diet without the risk
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Syallubus for CHEM 1301 General Chemistry I Fall 2011 SCIE 2.106‚ M‚W: 2:35-3:50 Instructor Name: Dr. J. G. Parsons Email: parsonsjg@utpa.edu Office: Science room number: 3.348 Phone: Office : 381-7462 Office Hours: M/W: 1:30-2:30 or by appointment CRN: 12626 REQUIRED MATERIALS: Text Book: Chemistry by Julia Burdge (ISBN 978-0-07-302554-4) Scientific calculator (ARIS software package Required) RECOMMENDED MATERIALS: Burdge study guide Blackboard web course and a UTPA email address. CREDIT: Lecture
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