AX3E

(Polar molecules, Non-polar molecules, etc.)

Moderators: Chem_Mod, Chem_Admin

kevinav
Posts: 32
Joined: Fri Sep 28, 2018 12:16 am

AX3E

Postby kevinav » Sun Dec 02, 2018 11:56 pm

What would be the molecular shape for the general formula AX3E

Zenita Leang 2K
Posts: 67
Joined: Fri Sep 28, 2018 12:28 am

Re: AX3E

Postby Zenita Leang 2K » Sun Dec 02, 2018 11:58 pm

The molecule with an AX3E shape have a trigonal pyramidal shape.

Sang Hyoun Hong 3G
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Re: AX3E

Postby Sang Hyoun Hong 3G » Mon Dec 03, 2018 1:32 am

The electron arrangement is tetrahedral but the molecular shape is trigonal pyramidal

Kenan Kherallah 2C
Posts: 78
Joined: Fri Sep 28, 2018 12:17 am

Re: AX3E

Postby Kenan Kherallah 2C » Mon Dec 03, 2018 1:50 am

It would be trigonal pyramidal since there is a lone pairs of electrons on the central atom in a tetrahedral arrangemen

504999383
Posts: 11
Joined: Fri Sep 28, 2018 12:25 am

Re: AX3E

Postby 504999383 » Mon Dec 03, 2018 9:19 am

a structure with an AX3E notation will be trigonal pyramidal

Kaylee Kang 1G
Posts: 65
Joined: Fri Sep 28, 2018 12:24 am

Re: AX3E

Postby Kaylee Kang 1G » Mon Dec 03, 2018 11:13 am

A molecule with AX3E would be trigonal pyramidal!

Veronica Soliman 4H
Posts: 51
Joined: Fri Sep 28, 2018 12:28 am

Re: AX3E

Postby Veronica Soliman 4H » Mon Dec 03, 2018 11:21 am

If you imagine this in 3D space, you can see that it is trigonal pyramidal tetrahedral. It is easy to confuse this with it being bent but be careful not to make that mistake.

cristinapadilla_1E
Posts: 33
Joined: Fri Sep 28, 2018 12:18 am

Re: AX3E

Postby cristinapadilla_1E » Mon Dec 03, 2018 12:39 pm

In order to really break this down to know that it is trigonal pyramidal, you must understand the notation used in VSEPR Model.
A is the central atom X is the number of bonded atoms E is the number of lone pairs

One example of a trigonal pyramidal shaped molecule is NH3.
N is the central atom, therefore A
There are 3 bonded atoms to N, 3 H atoms, therefore X3
There is one pair of lone pairs on top of the N, therefore E

Ricardo Martin 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:15 am

Re: AX3E

Postby Ricardo Martin 1J » Thu Dec 06, 2018 10:30 am

The electron arrangement would be tetrahedral, however since one is a lone pair the shape is trigonal pyramidal.

Julia Jones 1G
Posts: 29
Joined: Fri Sep 28, 2018 12:16 am

Re: AX3E

Postby Julia Jones 1G » Thu Dec 06, 2018 10:38 am

Because of the lone pair, AX3E would be trigonal pyramidal and not tetrahedral.

Catly Do 2E
Posts: 64
Joined: Fri Sep 28, 2018 12:24 am

Re: AX3E

Postby Catly Do 2E » Thu Dec 06, 2018 2:27 pm

First, add together the number of bonds in the molecule (the number following X). In this case, it is 3. Then add the number of lone pairs (the number following E). In this case, it is 1. 3 + 1 = 4. Therefore, we know that the shape is tetrahedral, but since there is a lone pair, the geometry is trigonal pyramidal.

Jack Hewitt 2H
Posts: 67
Joined: Fri Sep 28, 2018 12:27 am

Re: AX3E

Postby Jack Hewitt 2H » Thu Dec 06, 2018 5:57 pm

kevinav wrote:What would be the molecular shape for the general formula AX3E

The molecule would have a trigonal pyramidal molecular shape.

Jacqueline Duong 1H
Posts: 61
Joined: Fri Sep 28, 2018 12:28 am

Re: AX3E

Postby Jacqueline Duong 1H » Sun Dec 09, 2018 8:26 pm

It would be trigonal pyramidal.

Andreana Vetus 1A
Posts: 28
Joined: Fri Sep 28, 2018 12:17 am

Re: AX3E

Postby Andreana Vetus 1A » Sun Dec 09, 2018 8:36 pm

First, look at the steric number of the lewis structure, which is 4 (there are 4 regions of electron density). Then look at the surrounding atoms to the central atom. The subscript following the X in the VSEPR formula indicates that there are 3 surrounding atoms. Lastly, look at the number of lone pairs attached to the central atom. The subscript to E is 1 (most times invisible), which tells us that there is only one lone pair. From here we can determine that though the shape of a structure with 4 regions of electron density would be tetrahedral, AX3E is trigonal pyramidal due to the lone pair repulsion.

Brian Cook
Posts: 34
Joined: Fri Sep 28, 2018 12:15 am

Re: AX3E

Postby Brian Cook » Sun Dec 09, 2018 9:29 pm

The shape is trigonal pyramidal and you base it off of the original tetrahedral shape, for once you remove a bond and add an electron pair to tetrahedral, it becomes trigonal pyramidal.

Estelle Jung
Posts: 31
Joined: Fri Sep 28, 2018 12:29 am

Re: AX3E

Postby Estelle Jung » Sun Dec 09, 2018 10:15 pm

It would be trigonal pyramidal because of the extra lone pair.

Nicolle Fernandez 1E
Posts: 56
Joined: Fri Sep 28, 2018 12:25 am
Been upvoted: 1 time

Re: AX3E

Postby Nicolle Fernandez 1E » Sun Dec 09, 2018 10:38 pm

Trigonal pyramidal because the lone pairs move the bonds closer together

Anjali 4A
Posts: 59
Joined: Fri Sep 28, 2018 12:28 am

Re: AX3E

Postby Anjali 4A » Sun Dec 09, 2018 10:39 pm

It is sp3 hybridized and because there is a lone pair, the shape is trigonal pyramidal.

Claire Aseremo 1D
Posts: 34
Joined: Fri Sep 28, 2018 12:20 am

Re: AX3E

Postby Claire Aseremo 1D » Sun Dec 09, 2018 10:45 pm

Trigonal pyrimidal. Four areas of electron density, one of which being a lone pair.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 2 guests