Chemistry Student Handout Question & Answers 1. Most drugs are weak acids or weak bases. Is cocaine a weak acid or weak base? Cocaine is a weak base. 2. A weak acid or base can exist in 2 forms—charged (ionized) or uncharged (unionized). What is the major factor that determines whether the weak acid or base is charged or un- charged? The amount of H+ in comparison to OH- 3. In what chemical form (charged or uncharged) is cocaine snorted? Smoked? Why are they different? Cocaine (unionized) is
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Microbiology: study of small living things study of bacteria: bacteriology study of viruses: virology study of parasites: parasitology study of fungi: mycology NOT ALL BACTERIA ARE PATHOGENS (disease causing) antibiotic: used to treat bacterial infections and diseases (penicillin‚ mold‚ 1929) bioremediation: using bacteria to clean up toxins pathogenesis: ability of an organism to be pathogenic virulence factors: toxins‚ receptors‚ cellular composition innate immune response v.s
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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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Human Demography: The study of age-structured populations Lab Preparation: Read the lab and be on time. There will be a quiz. Also‚ we’ll be riding a bus to the field location. If you want to join us for lab‚ don’t miss the bus! Bring your lab manual‚ a hard notebook or clipboard‚ paper and charcoal (for rubbings) and wear warm‚ possibly waterproof clothes. We’ll be outside for a good portion of the lab regardless of the weather. Background: Demography Demography is the descriptive study
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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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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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Chem 201 Lab October 21‚ 2011 Lab #6: Preparation of 2-chloro-2-methylbutane – an Sn 1 Reaction Purpose The purpose of this experiment was to prepare an alkyl halide‚ 2-chloro-2-methylbutane by reacting 2-methyl -2-butanol (t-amyl alcohol) with hydrochloric acid. Alkyl halides are of wide interest because they are widespread and have diverse beneficial and detrimental impacts .The overall reaction is given below: Procedure 1 ml of 2-methyl-2-butanol was measured using 1 ml syringe and
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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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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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