StudentLecture_17 - /25/2010 Lab Wheres the Iron CH 8 an opportunity to apply your knowledge of spectrophotometry Reading Sections 8.7-8.8

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Lecture 17 10/25/2010 Lab: Where’s the Iron? CH 8, an opportunity to apply your knowledge of spectrophotometry Reading: Sections 8.7-8.8, 12.1-12.3, 4.5, 14.1-14.3 HW as usual
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IMFs combine in many liquids and solids Also called dispersion 2 Energies associated with IMFs
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Formation of Solutions Ethanol with water. Ethanol: Shake
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Formation of Solutions Ethanol with water: disorder increase and ∆E is negative (exothermic dissolution), both H 2 O and ethanol form hydrogen bonds
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Formation of Solutions break H-bonds & dispersion forces in H 2 O break dispersion dispersion forces & H-bonds in ethanol make equivalent H-bonds & dispersion forces in the solution
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Formation of Solutions Shake What will happen if we add dichloromethane to water?
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Formation of Solutions Dichloromethane with water: Disorder increase , but ∆E is unfaurable . (Break strong H ····O make weak Cl ····H, etc.)
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Formation of Solutions “Like dissolves like.” Here we mean solvents & solutes with similar intermolecular forces .
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Question #1 Solutions of Solids Solid I 2 is most soluble in: A. Dichloromethane B. Water Demo
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Question #2 Solutions of Solids KMnO 4 is most soluble in: A. Dichloromethane B. Water Demo
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This note was uploaded on 01/30/2011 for the course CHEM 116 taught by Professor Stevenson during the Spring '08 term at Purdue University-West Lafayette.

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StudentLecture_17 - /25/2010 Lab Wheres the Iron CH 8 an opportunity to apply your knowledge of spectrophotometry Reading Sections 8.7-8.8

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