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Help need to balance it

 
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Oct13-09, 02:05 PM   #1
 

Help need to balance it


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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Oct13-09, 02:19 PM   #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?
 
Oct14-09, 06:32 AM   #3
 
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
 
Oct14-09, 06:47 AM   #4
 
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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.

--
chemical calculators - buffer calculator, concentration calculator
www.titrations.info - all about titration methods
 
Oct14-09, 08:24 AM   #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
 
Oct14-09, 09:44 AM   #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.
 
Oct14-09, 10:27 AM   #7
 
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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