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Homework Help: Help need to balance it

  1. Oct 13, 2009 #1
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    need to balanc it

    3. The attempt at a solution
  2. jcsd
  3. Oct 13, 2009 #2


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    That appears to be redox so you could start from the individual half-cells and balance first for the electrons. A sensible result might still be found just using balancing of numbers of atoms using the unbalanced reactants and products.

    Try this: You see 3 chlorines on the left, and you see only 1 chlorine on the right. What must you do about this? What does this do the your balance of hydrogens? What more or next can you do?
  4. Oct 14, 2009 #3
    i now this i made this but the problem is at (B) i cant balance this but i need to make this with an oxidation and reducation sorry for my english .i tryed this also with valenc numbers but it dosent work
  5. Oct 14, 2009 #4


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    B is neither reduced nor oxidized, BCl3 just hydrolyses. The only redox here is hydrogen peroxide decomposition. This can be classifed as disproportionation reaction.

  6. Oct 14, 2009 #5
    o.0 thanks got it now u right borek about BCl but i was thinkin of the preoxid and HCl about their valenz but i have it now
  7. Oct 14, 2009 #6


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    The linewrapping distracted me and I analyzed the reaction incorrectly. At my end, the H3 ended the line and the next stuff continued on a new line and I mistook what was seen. Not very careful thinking.
  8. Oct 14, 2009 #7
    yeh i now thats why i said it needs to be done with a oxido reduction beacuse it dident worked in this form
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