Help need to balance it


by the pro
Tags: balance
the pro
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#1
Oct13-09, 02:05 PM
P: 43
1. The problem statement, all variables and given/known data

BCl3+H2O2>>H3
BO3+HCl
2. Relevant equations

need to balanc it

3. The attempt at a solution
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symbolipoint
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#2
Oct13-09, 02:19 PM
HW Helper
P: 2,692
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?
the pro
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#3
Oct14-09, 06:32 AM
P: 43
Quote Quote by symbolipoint View Post
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?
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

Borek
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#4
Oct14-09, 06:47 AM
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Help need to balance it


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

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the pro
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#5
Oct14-09, 08:24 AM
P: 43
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
symbolipoint
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#6
Oct14-09, 09:44 AM
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P: 2,692
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.
the pro
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#7
Oct14-09, 10:27 AM
P: 43
Quote Quote by symbolipoint View Post
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.
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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