CHEM_108_THREE_7

CHEM_108_THREE_7 - CHEMISTRY 108-02 NAME Brent Koplitz Exam...

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NAME CHEMISTRY 108-02 Brent Koplitz Exam #3 April 26,2006 You must show thinking where appropriate! (15pts) 1. (12 pts) 2. - 100 pts Useful / Useless Information R = 8.31 x kJ/mole ' "K q, (for AgBr) = 5.0 x 10-13 K,, (for AgCI) = 1.8 x 10"' &, (for PbCI,) = 1.6 x F = 96,500 Coulombs/mole of e'
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(13 pts) 1. AgNO,(aq) is slowly added to a solution that is 0.250 M NaCl and also 0.0022 M KBr. (a) Which anion should precipate first? (b) What is [Agf at the point at which the second anion begins to precipitate?
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(12 pts) 2.) How much time is required to electroplate 4.4 x 10.' g of Ag from a AgNO, solution using a current of 0.50 A ?
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(9 pts) 3.) For each of the following processes give the algebraic sign (+ or -) for Ap, ASo, and AGO. (No calculations are necessary. Use your chemical intuition.) a) The splitting of water to give gaseous oxygen and hydrogen atoms. b) Dissolving a smd amount of NH,Cl in water. (The solution becomes ate cold in the process.) c) The explosion of dynamite where liquid nitroglycerin gives
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This note was uploaded on 05/02/2008 for the course CHEM 118 taught by Professor Jacobsen during the Spring '08 term at Tulane.

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CHEM_108_THREE_7 - CHEMISTRY 108-02 NAME Brent Koplitz Exam...

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