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Unformatted text preview: Version 023 – Homework 2 – Lyon – (53565) 1 This print-out should have 15 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. This homework assignment is due Wednes- day, January 30, by 4:00PM. 001 10.0 points Which of the following statements is true re- garding solubility? Assume the solute does not affect the solvent and we are dealing with dilute solutions. 1. All the statements are false because the solute always affects the solvent resulting in a negative entropy of solution. 2. We can expect substances with positive enthalpies of solution always to be soluble only if the entropy of solution is positive. 3. We can expect substances with negative enthalpies of solution always to be soluble. 4. We can expect substances with positive enthalpies of solution always to be soluble. 5. We can expect substances with positive enthalpies of solution always to be soluble only if the entropy of solution is negative. 002 10.0 points What is the molality of sodium perchlorate (NaClO 4 ) in a solution preparted by dissolv- ing 125 g sodium perchlorate monohydrate in 500.0 g water? 1. 0.900 m 2. 3.56 m 3. 1.78 m 4. 0.250 m 5. 2.04 m 003 10.0 points Calculate the molality of ethanol in a solution of water, if the mole fraction of ethanol is 0.300....
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This homework help was uploaded on 04/09/2008 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas.
- Spring '07