biostudent101

10+ Year Member
Dec 24, 2008
43
0
Status
  1. Pre-Dental
Q314. how many lone electron pairs are found in AsBr3? the solution manual says 10 lone electron pairs. I don't understand where he got 10 from?

Thanks
 
May 28, 2009
130
0
Status
  1. Pre-Dental
Q314. how many lone electron pairs are found in AsBr3? the solution manual says 10 lone electron pairs. I don't understand where he got 10 from?

Thanks


Try to draw it out:

As has 5 total e-, sharing three , Br has 7 valence, sharing one.
Put 3 Br's around the central As and add up the pairs= 10 e- pairs.
 
May 15, 2009
1,922
3
CA
Status
  1. Dental Student
As = Group 5

Br = Group 7

5 + 3(7) = 26

Three bonds connect Br to the central As atom, so:

26 - 3(2) = 20 --># of lone pairs

Now distribute these 20 electrons around the Br and then As atoms:


How many pairs of red dots do you see?
10
 
This thread is more than 11 years old.

Your message may be considered spam for the following reasons:

  1. Your new thread title is very short, and likely is unhelpful.
  2. Your reply is very short and likely does not add anything to the thread.
  3. Your reply is very long and likely does not add anything to the thread.
  4. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
  5. Your message is mostly quotes or spoilers.
  6. Your reply has occurred very quickly after a previous reply and likely does not add anything to the thread.
  7. This thread is locked.
About the Ads