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Page 219 Chapter 12: Physical Properties of Solutions 1. A saturated solution A) contains more solute than solvent. B) contains more solvent than solute. C) contains equal moles of solute and solvent. D) contains the maximum amount of solute that will dissolve in that solvent at that temperature. E) contains a solvent with only sigma bonds and no pi bonds (i.e. only single bonds, with no double or triple bonds). Ans: D Category: Easy Section: 12.1 2. Which one of the following would be immiscible with water? Ans: C Category: Medium Section: 12.2 3. Heat of solution A) is never positive ( H soln 0), because the solute-solvent attraction is never weaker than the combination of the solute-solute attraction and solvent-solvent attraction. B) is always positive ( H soln > 0), because the solute-solvent attraction is always weaker than the combination of the solute-solute attraction and solvent-solvent attraction. C) is always zero ( H soln = 0), because the solute-solvent attraction is defined as the average of the solute-solute attraction and solvent-solvent attraction. D) is always negative ( H soln < 0), because the solute-solvent attraction is always stronger than the combination of the solute-solute attraction and solvent-solvent attraction. E) may be positive, zero, or negative, depending on the relative strength of the solute- solvent, solute-solute, and solvent-solvent attractive forces. Ans: E Category: Medium Section: 12.1 Chapter 12: Physical Properties of Solutions Page 220 4. Which response lists all the following pairs that are miscible liquids. Pair #1: octane (C 8 H 18 ) and water Pair #2: acetic acid (CH 3 COOH) and water Pair #3: octane (C 8 H 18 ) and carbon tetrachloride(CCl 4 ) A) 1, 3 B) 1, 2 C) 3 D) 2 E) 2, 3 Ans: E Category: Medium Section: 12.2 5. In which of the following solvents would you expect KBr to be most soluble? A) C 6 H 14 (hexane) D) CCl 4 (carbon tetrachloride) B) CH 3 CH 2 OH (ethanol) E) C 6 H 12 (cyclohexane) C) C 6 H 6 (benzene) Ans: B Category: Medium Section: 12.2 6. Which of the following liquids would make a good solvent for iodine, I 2 ? A) HCl B) H 2 O C) CH 3 OH D) NH 3 E) CS 2 Ans: E Category: Medium Section: 12.2 7. Which of the following compounds should be soluble in CCl 4 ? A) NaCl B) H 2 O C) NaOH D) C 8 H 18 E) None of these Ans: D Category: Medium Section: 12.2 8. A 9.50 % by mass solution of acetone (C 3 H 6 O) in water has a density of 0.9849 g/mL at 20C. What is the molarity of this solution? A) 0.621 M B) 1.61 M C) 1.66 M D) 1.71 M E) 16.9 M Ans: B Category: Medium Section: 12.3 9. A 15.00 % by mass solution of lactose (C 12 H 22 O 11 , 342.30 g/mol) in water has a density of 1.0602 g/mL at 20C. What is the molarity of this solution? ... View Full Document

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