Homework 09 - Gadhia, Tejas Homework 9 Due: Nov 14 2007,...

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Unformatted text preview: Gadhia, Tejas Homework 9 Due: Nov 14 2007, 11:00 pm Inst: James Holcombe 1 This print-out should have 27 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points Balance the redox reaction C + K 2 Cr 2 O 7 + H 2 SO 4 CO 2 + K 2 SO 4 + Cr 2 (SO 4 ) 3 + H 2 O . What is the coefficient of C in the balanced equation? 002 (part 1 of 1) 10 points Balance the redox reaction HNO 3 + H 3 PO 3 NO + H 3 PO 4 + H 2 O . What is the coefficient of HNO 3 in the bal- anced equation? 003 (part 1 of 1) 10 points Zinc Silver 1 . 56 V V Voltmeter e- e- 1 M Zn 2+ (aq) 1 M Ag + (aq) Salt bridge to carry ions In this electrochemical cell, what is the cathode? 1. the solid silver electrode 2. the solid zinc electrode 3. the Zn 2+ (aq) ions in the 1 M solution 4. the Ag + (aq) ions in the 1 M solution 004 (part 1 of 3) 10 points Consider the mercury cell below. Zinc anode Steel cathode HgO, KOH and ZnO combined in an aqueous paste What is the electrolyte? 1. KOH 2. ZnO 3. HgO 4. steel 005 (part 2 of 3) 10 points What is the oxidizing agent? 1. ZnO(s) 2. Zn(s) 3. Hg( ) 4. HgO(s) 006 (part 3 of 3) 10 points What are the reactants for the reaction? 1. Zn, ZnO 2. Zn, KOH 3. HgO, KOH 4. HgO, Zn 5. Zn, Hg 6. HgO, ZnO 007 (part 1 of 1) 10 points For the reaction Gadhia, Tejas Homework 9 Due: Nov 14 2007, 11:00 pm Inst: James Holcombe 2 Cu(s) + Ag + (aq) Cu + (aq) + Ag(s) 1. Cu is oxidized at the anode and Ag is reduced at the cathode. 2. Cu is reduced at the cathode and Ag is oxidized at the anode. 3. Cu is reduced at the anode and Ag is oxidized at the cathode....
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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 at Austin.

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Homework 09 - Gadhia, Tejas Homework 9 Due: Nov 14 2007,...

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