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Unformatted text preview: Version 423 Quiz 2 Laude (52455) 1 This print-out should have 8 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 5.0 points WITHDRAWN 002 5.0 points Consider the reaction at equilibrium: 2H 2 O( ) + O 2 (g) 2H 2 O 2 (aq) If you add more H 2 O 2 to the system, which direction will the reaction shift? 1. nothing will occur 2. the reaction will shift to the left correct 3. the reaction will shift to the right 4. not enough information Explanation: The Le Chatelier principle states that when a stress is applied to a system that is at equi- librium, the system will respond in such a way to restore that equilibrium and mitigate the effects of the applied stress. In this case, our system is: 2H 2 O( ) + O 2 (g) 2H 2 O 2 (aq) and it is at equilibrium. The act of adding more H 2 O 2 will force the system to shift left in order to consume the H 2 O 2 and restore equilibrium. 003 5.0 points (Hint: the MW of NaCl is 58.44. And the mass of NaCl in the problem is some integer multiple of this.) Pure water remains in the liquid phase from 273 K up to 373 K, a range of 100 K. Over273 K up to 373 K, a range of 100 K....
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This note was uploaded on 05/11/2010 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.
- Spring '07