Homework 03 - Gadhia, Tejas Homework 3 Due: Sep 26 2007,...

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1 This print-out should have 27 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points The reaction A + B * ) C + 2 D has an equilibrium constant oF 3 . 7 × 10 - 3 . Consider a reaction mixture with [A] = 2 . 0 × 10 - 2 M [B] = 1 . 7 × 10 - 4 M [C] = 2 . 4 × 10 - 6 M [D] = 3 . 5 × 10 - 3 M Which oF the Following statements is def- nitely true? 1. The system is at equilibrium. 2. No conclusions about the system can be made without additional inFormation. 3. The reverse reaction can occur to a greater extent than the Forward reaction until equilibrium is established. 4. Heat will be evolved. 5. The Forward reaction can occur to a greater extent than the reverse reaction until equilibrium is established. 002 (part 1 oF 1) 10 points Write the equilibrium constant For 2 NaBr(aq) + Pb(ClO 4 ) 2 (aq) PbBr 2 (s) + 2 NaClO 4 (aq) . 1. K = 1 [Pb(ClO 4 ) 2 ][NaBr] 2 2. K = [PbBr 2 ] [Pb 2+ ][Br - ] 2 3. K = [NaClO 4 ] 2 [NaBr] 2 [Pb(ClO 4 ) 2 ] 4. K = [Pb 2+ ][Br - ] 2 5. K = 1 [Pb 2+ ][Br - ] 2 003 (part 1 oF 1) 10 points An equilibrium in which processes occur con- tinuously, with NO NET change, is called 1. dynamic equilibrium. 2. hetergeneous equilibrium. 3. homogeneous equilibrium. 4. static equilibrium. 004 (part 1 oF 1) 10 points The expression For K c For the reaction at equi- librium is 4 NH 3 (g) + 5 O 2 (g) * ) 4 NO(g) + 6 H 2 O(g) 1. [NO] 4 [H 2 O ] 6 2. [NH 3 ] 4 [O 2 ] 5 3. [NO] 4 [H 2 O] 6 [NH 3 ] 4 [O 2 ] 5 4. [NH 3 ] 4 [O 2 ] 5 [NO] 4 [H 2 O] 6 005 (part 1 oF 1) 10 points The equilibrium constant For the reaction 2 SO 2 (g) + O 2 (g) * ) 2 SO 3 (g) has the value K = 4 × 10 24 at 298 K. ±ind the value oF K For the reaction SO 2 (g) + 1 2 O 2 (g) * ) SO 3 (g) at the same temperature. 1.
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This note was uploaded on 03/19/2011 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas.

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Homework 03 - Gadhia, Tejas Homework 3 Due: Sep 26 2007,...

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