lone pairs


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Moryel Yashar 1J
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Joined: Fri Sep 28, 2018 12:15 am

lone pairs

Postby Moryel Yashar 1J » Sat Dec 01, 2018 8:33 pm

Are lone pairs taken into consideration when determining the hybridization of a central atom?

Nicholas Carpo 1L
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Joined: Fri Sep 28, 2018 12:19 am

Re: lone pairs

Postby Nicholas Carpo 1L » Sat Dec 01, 2018 8:52 pm

Yes the lone pairs are taken into account since the number of hybrid orbitals is equal to the number of regions of e- density around the atom.

Yvonne Du
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Joined: Fri Sep 28, 2018 12:23 am

Re: lone pairs

Postby Yvonne Du » Sun Dec 02, 2018 12:04 am

Yes, one lone pair is considered as one electron density. Since hybridization is based on the number of electron density, you consider lone pairs too.

Kavya Juwadi 3C
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Joined: Fri Sep 28, 2018 12:25 am

Re: lone pairs

Postby Kavya Juwadi 3C » Sun Dec 02, 2018 12:12 am

One example of this would be the the molecule H^2O. The central atom, oxygen has two bonds ( one with each hydrogen ) and two sets of lones pairs. Therefore the hybridization of oxygen would sp^3.

Tony Ong 3K
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Joined: Fri Sep 28, 2018 12:23 am

Re: lone pairs

Postby Tony Ong 3K » Sun Dec 02, 2018 12:56 am

yes lone pairs dictates the molecular shape.
For instance, let us assume that a central atom has a steric number of 4. This means that its electron arrangement is tetrahedral, however say it has 2 lone pairs. This means that the molecular shape is angular.

Anyhow, Have a nice night!!!

Samantha Chang 2K
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Joined: Fri Sep 28, 2018 12:17 am

Re: lone pairs

Postby Samantha Chang 2K » Sun Dec 02, 2018 9:40 am

Yes, a lone pair is considered a region of electron density and therefore you will count it to find hybridization.

Eruchi Okpara 2E
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Joined: Fri Sep 28, 2018 12:28 am

Re: lone pairs

Postby Eruchi Okpara 2E » Sun Dec 02, 2018 11:39 am

Is the answer automatically wrong if lone pairs are not separated from the shared pairs of electrons? for instance, if something has 3 shared pairs of electrons and 2 lone pairs, can it only be written as AX3E2 or can you write it as AX5?

SophiaKohlhoff4B
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Re: lone pairs

Postby SophiaKohlhoff4B » Sun Dec 02, 2018 1:59 pm

Eruchi Okpara 4D wrote:Is the answer automatically wrong if lone pairs are not separated from the shared pairs of electrons? for instance, if something has 3 shared pairs of electrons and 2 lone pairs, can it only be written as AX3E2 or can you write it as AX5?


The VSEPR formula calls to use A for the central atom, X for the bonded atoms, and E for the lone pairs of electrons. You can't write AX3E2 as AX5 because the shape of the molecules will be different.

Abhi4F
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Joined: Fri Sep 28, 2018 12:28 am

Re: lone pairs

Postby Abhi4F » Sun Dec 02, 2018 4:30 pm

Yes, since lone pairs are a region of electron density it is taken into account for hybridization.

Daniel Lai
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Re: lone pairs

Postby Daniel Lai » Sun Dec 02, 2018 4:31 pm

Lone pairs count as an area of electron density so they count for hybridization.

leediane0916
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Joined: Fri Sep 28, 2018 12:29 am

Re: lone pairs

Postby leediane0916 » Sun Dec 02, 2018 4:40 pm

the lone pair counts as one electron density so you have to consider it!

305127455
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Joined: Fri Sep 28, 2018 12:16 am

Re: lone pairs

Postby 305127455 » Sun Dec 02, 2018 8:09 pm

Long pairs does count, and memorizing this and "formula" of hybridization should be enough to solve most of the related problems.

905109118
Posts: 34
Joined: Mon Oct 01, 2018 12:16 am

Re: lone pairs

Postby 905109118 » Sun Dec 02, 2018 8:24 pm

Yes the lone pairs are taken into consideration. The number of hybrid orbitals is equal to the number of regions around the atom.

Divya Pimparkar 1E
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Joined: Fri Sep 28, 2018 12:19 am

Re: lone pairs

Postby Divya Pimparkar 1E » Sun Dec 02, 2018 8:53 pm

Yes, lone pairs are taken into account for hybridization because they are an electron region so they're used for placing electrons in hybrid orbitals

Anand Narayan 1G
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Joined: Fri Sep 28, 2018 12:15 am

Re: lone pairs

Postby Anand Narayan 1G » Sun Dec 02, 2018 9:23 pm

Yes, Lone pairs do indeed count as an area of electron density, so yes, they count for hybridization.

Anjali 4A
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Joined: Fri Sep 28, 2018 12:28 am

Re: lone pairs

Postby Anjali 4A » Sun Dec 02, 2018 11:10 pm

To figure out hybridization, we need to calculate the steric number which is the number of sigma bonds and number of lone pairs, therefore do have to take lone pairs into account when figuring out the hybridization.

Ricardo Martin 1J
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Joined: Fri Sep 28, 2018 12:15 am

Re: lone pairs

Postby Ricardo Martin 1J » Thu Dec 06, 2018 10:54 am

Yes, since hybridization relates to the # of areas of electron density and lone pairs are considered an area of electron density, then lone pairs are taken into consideration for hybridization.

Jaifreen_Bhangu_3K
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Joined: Fri Sep 28, 2018 12:26 am

Re: lone pairs

Postby Jaifreen_Bhangu_3K » Thu Dec 06, 2018 11:01 am

Yes, you consider all regions of electron density.

Jchellis 1I
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Joined: Fri Sep 28, 2018 12:15 am

Re: lone pairs

Postby Jchellis 1I » Thu Dec 06, 2018 3:55 pm

Lone pairs count just as much as an atom for a region of electron density

josephperez_2C
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Joined: Wed Nov 15, 2017 3:04 am

Re: lone pairs

Postby josephperez_2C » Thu Dec 06, 2018 4:30 pm

Each lone pair is considered a region of electron density so they should be taken into account.

Jack Hewitt 2H
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Joined: Fri Sep 28, 2018 12:27 am

Re: lone pairs

Postby Jack Hewitt 2H » Thu Dec 06, 2018 5:55 pm

Moryel Yashar 1J wrote:Are lone pairs taken into consideration when determining the hybridization of a central atom?

Yes lone pairs are taken into consideration because they are still areas of electron density.


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