Homework #7 - purdy (sbp456) Homework 7 flowers (53885) 1...

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Unformatted text preview: purdy (sbp456) Homework 7 flowers (53885) 1 This print-out should have 28 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. HW 7 due 07 November 2008 at 11PM, Solutions to follow at 11:05 PM. 001 10.0 points Consider the oxidation-reduction reaction Na 2 SnO 2 + Bi(OH) 3- Bi + Na 2 SnO 3 + H 2 O What is the coefficient of Bi in the balanced equation? 1. 3 2. 2 3. None of these 4. 1 5. 4 6. 12 7. 10 8. 8 9. 6 10. 5 002 10.0 points Oxidation occurs 1. at the anode. 2. at both anode and cathode. 3. at the cathode. 4. at either, depending on whether the cell is electrochemical or electrolytic. 5. in the electrolyte. 003 10.0 points In an electrochemical cell, the electrode at which reduction takes place is called the 1. anode. 2. cathode. 3. It depends upon whether the cell is gal- vanic or electrolytic. 004 10.0 points Consider the half-reactions and the bal- anced equation for the cell reaction repre- sented by the skeletal equation Mn(s) + Ti 2+ (aq) Mn 2+ (aq) + Ti(s) . What is the proper cell diagram for this reac- tion? 1. Ti(s) | Ti 2+ (aq) || Mn 2+ (aq) | Mn(s) 2. Mn 2+ (aq) | Mn(s) || Ti(s) | Ti 2+ (aq) 3. Mn(s) | Mn 2+ (aq) || Ti 2+ (aq) | Ti(s) 4. Ti 2+ (aq) | Ti(s) || Mn(s) | Mn 2+ (aq) 005 10.0 points The reaction 2 Na + + 2 Cl 2 Na + Cl 2 is indicative of ? cell; the sign of the anode is ? . 1. a voltaic; negative 2. an electrolytic; positive 3. an electrolytic; negative 4. a voltaic; positive 006 10.0 points purdy (sbp456) Homework 7 flowers (53885) 2 Zinc (Anode) Silver (Cathode) 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 re- duction half reaction?...
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This note was uploaded on 11/06/2008 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 #7 - purdy (sbp456) Homework 7 flowers (53885) 1...

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