VSEPR confusion

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

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BriannaParrington-1B
Posts: 29
Joined: Fri Apr 06, 2018 10:04 am

VSEPR confusion

Postby BriannaParrington-1B » Sun May 27, 2018 9:32 pm

Can someone explain to me the concept of VSEPR?

salvadoralvizo1J
Posts: 29
Joined: Fri Apr 06, 2018 10:01 am

Re: VSEPR confusion

Postby salvadoralvizo1J » Sun May 27, 2018 9:58 pm

Lewis structure simply gives us the basics of valence electrons, ie how many pairs there are, how many single double or triple bonds, how many electrons in general. VSEPR actually tells you the angle of the shapes in a 3-D perspective. All electrons wish to be as far away from each other as possible while maintaing their positions within orbitals, which give rise to the shapes we saw in the models in class.

Alexis Bravo 1D
Posts: 30
Joined: Tue Nov 14, 2017 3:01 am

Re: VSEPR confusion

Postby Alexis Bravo 1D » Sun May 27, 2018 10:03 pm

VSEPR is how we predict the geometry of molecules from the number of electron pairs surrounding their central atoms. It helps us get a 3-D picture of what molecules actually look like.

Hope_Pham_1G
Posts: 29
Joined: Fri Apr 06, 2018 10:04 am

Re: VSEPR confusion

Postby Hope_Pham_1G » Sun May 27, 2018 10:41 pm

Is the VSEPR model connected to determining sigma and pi bonds? If so, how?

Kate Manganaro 1F
Posts: 32
Joined: Fri Apr 06, 2018 10:03 am

Re: VSEPR confusion

Postby Kate Manganaro 1F » Mon May 28, 2018 2:22 pm

Hello --
VSEPR Model stands for Valence-Shell Electron-Pair Repulsion Model. For each molecule, this molecule illustrates the location of bonding electrons and lone pairs with respect to the central atom. Bonding pair electrons and lone pair electrons repel each other, so the VSEPR Model takes this into account. Basically, the VSEPR Model is used to predict the geometric shape of the molecule using the location of the electrons.
Hope this helps!

Haison Nguyen 1I
Posts: 30
Joined: Fri Apr 06, 2018 10:04 am

Re: VSEPR confusion

Postby Haison Nguyen 1I » Mon May 28, 2018 4:52 pm

A lewis structure just shows us how many valence electrons there are and what kind of bonds are used whereas the VSEPR model gives the actual shape of the valence electrons in a molecule. The shape is determined by the repulsion of the electrons which can create various shapes such as linear, tetrahedral, octahedral, etc.

Jordanmarshall
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Joined: Fri Apr 06, 2018 10:03 am

Re: VSEPR confusion

Postby Jordanmarshall » Wed May 30, 2018 10:23 am

What is the VSPER formula?

Salena Chowdri 1I
Posts: 34
Joined: Fri Apr 06, 2018 10:02 am

Re: VSEPR confusion

Postby Salena Chowdri 1I » Wed May 30, 2018 2:37 pm

^^ Valence shell electron pair repulsion (VSEPR) theory is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. The VSEPR formula is just the structure.

Neha Divi 1K
Posts: 31
Joined: Fri Apr 06, 2018 10:02 am

Re: VSEPR confusion

Postby Neha Divi 1K » Thu May 31, 2018 11:28 am

To add on to what others said, VSEPR is used as a model in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms.


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