Balancing Redox Reaction Video Lessons

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Problem: Design a voltaic cell from the following half-reactions:     Cr2O7(aq) + 14 H+(aq) + 6 e − → 2 Cr3+(aq) + 7 H2O(l)         E° = 1.33     O2(g) + 4 H+(aq) + 4 e − → 2 H2O(l)                                       E° = 1.23In the overall reaction, how many H + ions would be shown and which side would they be on?A.  18 on the leftB.  16 on the leftC.  10 on the leftD.  10 on the rightE.  12 on the right

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Problem Details

Design a voltaic cell from the following half-reactions:

     Cr2O7(aq) + 14 H+(aq) + 6 e → 2 Cr3+(aq) + 7 H2O(l)         E° = 1.33

     O2(g) + 4 H+(aq) + 4 e → 2 H2O(l)                                       E° = 1.23

In the overall reaction, how many H + ions would be shown and which side would they be on?

A.  18 on the left

B.  16 on the left

C.  10 on the left

D.  10 on the right

E.  12 on the right

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