prac ex 1 - Practice Exam 1 Chapters 12 and 14 Circle the...

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Practice Exam 1 Chapters 12 and 14 Circle the best answer on questions 1 – 11 Show your work on problems 12 - 20 1. The mass percent of acetone in a solution prepared by mixing 58.1 g acetone (C 3 H 6 O) and 72.1 g of H 2 O is: 1. 44.6% 2. 80.6% 3. 55.4% 4. 13.9% 5. none of these 2. Which substance listed below would be most likely to dissolve in H 2 O? 1. BaCl 2 2. I 2 3. C 2 H 6 4. CH 2 Cl 2 5. none would dissolve 3. The term that describes the situation where a cation in water solution is closely surrounded by water molecules is: 1..hydration. 2. clathrate. 3. water of crystallization 4. dielectric constant. 5. none of these 4. The solubility of a substance decreases with increasing temperature: 1. only if the solute is a gas. 2. when the enthalpy of solution is negative. 3. for all substances with low solubilities. 4. only for non-electrolytes. 5. none of these 5. The presence of a nonvolatile solute in water will: 1. lower the freezing point, vapor pressure, and boiling point. 2. raise the freezing point, vapor pressure, and boiling point. 3. lower the freezing point and vapor pressure and raise the boiling point. 4. raise the freezing point and lower the vapor pressure and boiling point.
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This note was uploaded on 02/20/2012 for the course CHEM 112 taught by Professor Chen during the Spring '09 term at South Carolina.

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prac ex 1 - Practice Exam 1 Chapters 12 and 14 Circle the...

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