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Homework Help: Balancing redox equations using 1/2 reaction method

  1. Oct 18, 2011 #1
    1. The problem statement, all variables and given/known data
    Balance PbO2(s) + Cl(-) → PbCl2(s) + O2(g)

    2. Relevant equations
    n/a

    3. The attempt at a solution
    Pb(4+) + 2e(-) → Pb(2+) and I'm stuck because there's no 2nd reaction.
     
  2. jcsd
  3. Oct 18, 2011 #2

    Borek

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    Staff: Mentor

    Yes there is - if you can't see it, assign oxidation numbers to all elements on both sides.
     
  4. Oct 18, 2011 #3
    Um 2H2O + 2Cl(-) → O2 + 4H(+) + 6e(-)? Is this right?
     
  5. Oct 19, 2011 #4

    Borek

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    Staff: Mentor

    No.

    Have you tried to assign oxidation numbers? As long as you will ignore hints you will not move forward.
     
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