lect_14oct29f08

lect_14oct29f08 - Outline 14 29-OCT-2008 1. ReviewTypes: 1....

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1 Outline 14 29-OCT-2008 1. Review- Types: 1. Exchange 2. Redox (O.N. changes) Will Rxn Occur? Prptn Rxns - Solubility “Rule” 2. Acid-Base Arrhenius, Bronsted –Lowrey 3. Classification of Acids & Bases Strong & Weak? 4. Writing Equations -Neutralization Molecular, total & net ionic, Stoichiometry
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2 Review: Types of Chemical Reactions 1. Metatheses (Exchange) a. Precipitation Reactions (soluble?) b. Acid-base Reactions (strong?) 2. Oxidation-Reduction Reactions (redox) (O.N. changes?) Two main reaction types.
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3 Solubility Rules (“common” Ionic Compounds) [‘ordinary’ temperatures] (Follow sequence* ) A. Soluble 1. Group IA and NH 4 + 2. NO 3 - ,C 2 H 3 O 2 - , ClO 4 - (most), ClO 3 - B. Mostly Soluble 1. (Cl - , Br - , I - ) (except Ag + , Pb 2+ , Hg 2 2+ ,Cu + ) F - (except Pb +2 and group 2A). Group 7A (halides). 2. SO 4 2- (except Ag + , Pb 2+ , group 2A Ca +2 and down) C. Insoluble 1. PO 4 3- , CO 3 2- , O 2- , S 2- (except 2A), OH - (except group 2A, Ca +2 and down)
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4 Precipitation Reactions, Examples Predicting Precipitation Reactions. Use slide 3. Write molecular, total ionic, net ionic, spectator ions (a) MgCl 2 + AgNO 3 ? (b) Ca(NO 3 ) 2 + K 2 SO 4 ? (c) lead(II) nitrate + potassium bromide (d) Aluminum nitrate + sodium phosphate
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5 Ion Stoichiometry, Ex. 1 Ex:p. 4.21 (b), p.169 Given: 2.47 mL of 1.98 M hydroiodic acid Find: total mol hydrogen ions Soln: find mol of acid then mol ions # mol acid (HI) = 0.00247 L * (1.98 mol HI/L) = 4.89 *10 -3 mol HI # mol ions = 4.89 *10 -3 mol HI * (1 mol H + / mol HI) = 4.89 *10 -3 mol H +
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6 Precipitation Stoichiometry, Ex. 1 Ex: 4.35, p. 170. Given: 35.0 mL of lead(II) nitrate soln is mixed with excess sodium iodide to give 0.628 g ppt.
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This note was uploaded on 02/18/2009 for the course CHEM 1A taught by Professor Okamura during the Fall '08 term at UC Riverside.

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lect_14oct29f08 - Outline 14 29-OCT-2008 1. ReviewTypes: 1....

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