Exam I CHM 331 Fall 2006 key(done)

# Exam I CHM 331 Fall 2006 key(done) - CHM 331 Exam I...

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Unformatted text preview: CHM 331 Exam I September 28, 2006 Time: 50 min Dr. Jumean ~ame ~ ~ ~ ,tj ------- 11)---------- Equation sheet provided. 1. (15 points) Suppose that the extended Debye-Huckellaw for a 1-1 electrolyte of molality m is written in the form: log)cl: =- 0.509 -vm + k m where k is a constant. Show that a plot ofY against m should give a straight line with intercept Eo and slope -0.118 k. Y is given by: 0- r;r 11 h<"- P "- )~ ~- ~ ~ F~" .~Y1.. 1.1 Y'I .- o.o~1 Ii"- {1/J ::- ;; o~ ". I '51 (7 f>I- ,,-/I ~ '1 (.! ;:: IF- ()., I d 1 m- ." f( ~ q5D i r;.. ok Ie J b-to- (I~Urf#Ol - 0:)0'1 .;-;1-= ;;u _<HI~ k...... Y=E+0.118 [logm-0.509-vmJ. £';, £-- pl,t ~ '1 ~. n\. ; " w«.pt ;; €' s I~ ;:- 0- \ d ~ 2. (15 points) For BaSO4,the dependence ofthe mean ionic activity coefficient on ionic strength (I) is given by the equation: log')'.:!:: =- 0.509Iz+llz-lvt- 0.20 I At what value ofl would the solubility of BaSO4be a maximum?...
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## This note was uploaded on 12/17/2011 for the course CHEMICAL E 304 taught by Professor Darwish during the Spring '11 term at American University of Sharjah.

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Exam I CHM 331 Fall 2006 key(done) - CHM 331 Exam I...

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