H02- Chapter 17 - fernandez (jf23742) H02: Chapter 17...

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fernandez (jf23742) – H02: Chapter 17 – McCord – (90262) 1 This print-out should have 29 questions. Multiple-choice questions may continue on the next column or page – Fnd all choices before answering. A reminder that EXAM 1 is on Monday, August 20th, from 8:30 to 9:45 AM in WEL 2.224 - this is not our regular classroom, al- though it is next door. Bring a scientiFc cal- culator and your pencil for the exam. Please skip at least one seat between each student. 001 10.0 points Dissociation of a solid is aided by 1. weak binding of species in the solid and strong interactions between the solvent and solute. 2. strong binding in the solid and weak solvent-solute interaction. 3. strong interaction between solvent molecules. 4. None of these is correct. 002 10.0 points Some distilled water is added to an empty beaker. A gram of copper(II) nitrate is added to the beaker with stirring. After a few min- utes, what is in the beaker? 1. a sticky material of copper hydronitrite 2. solid copper, nitrate ions, and water 3. solid copper(II) nitrate and water 4. copper ions, nitrate ions, and water 5. nitrogen gas, copper atoms, electrons, and water 003 10.0 points Both ammonia and phosphine (PH 3 ) are sol- uble in water. Which is least soluble and why? 1. ammonia; the N - H bonds are so strong that they cannot break to enable the ammonia to hydrogen-bond with water. 2. phosphine; it does not form hydrogen bonds with water molecules. 3. ammonia; it is too small to be hydrated by water molecules. 4. ammonia; it does not form hydrogen bonds with water molecules. 5. phosphine; the P - H bonds are so strong that they cannot break to enable phosphine to hydrogen-bond with water. 004 10.0 points Water causes many electrolytes to dissociate 1. because water molecules are dipoles and the dipoles orient in an energetically favorable manner to solvate the ions. 2. because of repulsive interactions between ions in the crystalline state. 3. because it undergoes hydrogen bonding to large halide ions. 4. because the dispersion forces between ion and solvent are strong. 005
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H02- Chapter 17 - fernandez (jf23742) H02: Chapter 17...

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