Formal charge


Moderators: Chem_Mod, Chem_Admin

OrAmar-1L
Posts: 35
Joined: Fri Sep 29, 2017 7:04 am

Formal charge

Postby OrAmar-1L » Mon Jun 04, 2018 8:45 pm

In regards to counting the electrons on the molecule to make sure that each atom has the right amount, when are bonds counted as two electrons and when are they counted as one? I might be pretty confused so if the question is off let me know(:

Nahelly Alfaro-2C
Posts: 59
Joined: Wed Nov 15, 2017 3:04 am

Re: Formal charge

Postby Nahelly Alfaro-2C » Mon Jun 04, 2018 9:29 pm

Bonds are always counted as one electron, never as two electrons. If a single bond is present there is one election. In the presence of a double bond, there are two electrons If a triple bond is present there are three electrons.

Maria Zamarripa 1L
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am
Been upvoted: 1 time

Re: Formal charge

Postby Maria Zamarripa 1L » Sun Jun 10, 2018 5:34 pm

If you are checking for formal charge and actually plugging into the equation then you should count bonds as two because you will be multiplying by 1/2 anyway, but if you are just counting them and subtracting from the number of valence electrons it has then only count the bonds as having one electron.

Adam Yaptangco 1D
Posts: 32
Joined: Sun Dec 10, 2017 3:02 am
Been upvoted: 1 time

Re: Formal charge

Postby Adam Yaptangco 1D » Sun Jun 10, 2018 5:57 pm

When checking formal charge, bonds count as a single electron if you are not using the equation and just counting, but if you are trying to satisfy an octet, a single bond counts as two electrons for an atom.

FizaBaloch1J
Posts: 41
Joined: Fri Apr 06, 2018 11:01 am

Re: Formal charge

Postby FizaBaloch1J » Sun Jun 10, 2018 8:26 pm

Lone pairs are counted as 2 electrons, while a single bond is counted as one valence electron when determining formal charge.

Molly Oakes 1A
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

Re: Formal charge

Postby Molly Oakes 1A » Sun Jun 10, 2018 10:33 pm

You count single bonds as two if you're plugging them into the equation (because they get divided by two in the equation), but you can count them as one to skip dividing by two.


Return to “Formal Charge and Oxidation Numbers”

Who is online

Users browsing this forum: No registered users and 1 guest