HW9 - ssh525 hw09 McCord (53580) This print-out should have...

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ssh525 – hw09 – McCord – (53580) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. Please do NOT use the Standard Potentials From our textbook. IF you fnd any problems on this assignment that do not give you the potential in the problem, then go to our web page and get the Table oF Standard Potentials that I posted there. I will do my best to keep this table up-to-date. - Dr. McCord http://courses.cm.utexas.edu/pmccord/ ch302/help/red-table.html 001 10.0 points In the halF-reaction Cr 2 O 2 7 Cr 3+ what is the change in the oxidation state oF Cr? (Note that oxygen retains an oxidation state oF - 2). 1. +6 to +3 2. +8 to +3 3. - 8 to +3 4. - 4 to +3 5. +4 to +3 6. - 6 to +3 002 10.0 points Balance the reaction SnCl 2 + K 2 Cr 2 O 7 + HCl CrCl 3 + KCl + SnCl 4 + H 2 O . What is the coe±cient oF KCl in the bal- anced equation? 003 (part 1 oF 2) 10.0 points Using oxidation and reduction halF- reactions, balance the skeletal equation O 3 (aq) + Br (aq) O 2 (g) + BrO 3 (aq) oF the action oF ozone on bromide ions. The reaction takes place in a basic solution. What is the smallest possible integer coe±cient oF BrO 3 in the combined balanced equation? 004 (part 2 oF 2) 10.0 points IdentiFy the reducing agent in this reaction. 1. O 2 2. Br 3. BrO 3 4. O 3 005 10.0 points What takes place at the negatively charged terminal oF a voltaic cell? 1. the net redox reaction 2. oxidation 3. combustion 4. reduction 006 10.0 points When the Ag(s) | AgCl(s) | Cl (aq) electrode acts as a cathode, the reaction is 1. Ag(s) + Cl (aq) AgCl(s) + e
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This note was uploaded on 04/10/2008 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas.

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HW9 - ssh525 hw09 McCord (53580) This print-out should have...

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