Register to reply

Help need to balance it

by the pro
Tags: balance
Share this thread:
the pro
#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
Phys.Org News Partner Science news on Phys.org
Security CTO to detail Android Fake ID flaw at Black Hat
Huge waves measured for first time in Arctic Ocean
Mysterious molecules in space
symbolipoint
#2
Oct13-09, 02:19 PM
HW Helper
PF Gold
P: 2,797
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
#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
#4
Oct14-09, 06:47 AM
Admin
Borek's Avatar
P: 23,393
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.

--
methods
the pro
#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
#6
Oct14-09, 09:44 AM
HW Helper
PF Gold
P: 2,797
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
#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


Register to reply

Related Discussions
Plants' co2 balance Biology 2
Mass balance/Charge balance Biology, Chemistry & Other Homework 2
Balance CM General Physics 5
Why does a balance balance? General Physics 4
How do you balance Mg + HCl? Introductory Physics Homework 2