oldEXAM$_connor - Version 289 Exam 4 - If the measured cell...

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Version 289 Exam 4 - sutcliffe (51630) If the measured cell potential for the cell is 0.39 volts, what is the pH of the solution? L.4.12 tDl, z.oe 3. less than 1.00 4.3.4 5. 5.45 , ^'at/ v f - u'' 011 1O.O points A catalyst increases the rate of a reaction by 1. changing the value of AGr*'. 2. increasing the ellergv of the reactants. 3. increasing the number of rnolecular colli- sions. 4. decreasing A1{,.-.,. 5. decreasing the energ)- ofthe reactants. 6. increasing the activation energy. 7. increasing the energy of the products. [8\' d""r"using the activation energy. \) \J @ For a redox reaction to be spontaneous under "{. *# standard conditions. which of the following /"'j cANNor be correcr. oG' 'fi j*lr 1.AG6<0 o{1- "f[ 2.K>1 3. -8."n ) 0 ,W^.t 013 10.O points What is the half-life of a reaction that has a rate constant of 280 s-1? 1. 194 s DJ 2.5 ms 3. The concentration of the reactant needed. 4. 3.6 ms 5. 404 ms OL4 10.O points Copper is plated on zinc by immersing a piece of zinc into a solution containing copper(Il) iorrs. In the plating reaction, z\nc $ tor", two electrons and is oxiclized. 2. gains two electrons and is reduced. X 1or"r tri'o electrons and is redr:ced. {gains ts'o electrons and is oxidized. 015 1O.O points For the reaction NO+Os-+NOz*Oz Trial [NO]o [O:]o initial rate 1 2 .) 0.5 0.1 0.1 0.1 0.2 0.1 15.0 x 102 3.0 x 102 3.0 x 102 Deduce the order with respect to NO, 03, and the rate constant (dimensions left out of the latter on purpose) based on the above data. IIL A ty 1;0;3 x 10" 2.2i 7;3 x 104 3. 0; 1;3 x 103 4. 1; 1;3 x 5.2;0;3x 102 104
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Version 289 - Exam 4 - sutcliffe * (51630) double. 6.5;
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This note was uploaded on 03/26/2012 for the course CHEM 302 taught by Professor Mccord during the Fall '10 term at University of Texas at Austin.

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oldEXAM$_connor - Version 289 Exam 4 - If the measured cell...

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