VSEPR- Polar vs Nonpolar

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

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Samantha Pacheco 2K
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

VSEPR- Polar vs Nonpolar

Postby Samantha Pacheco 2K » Fri Nov 16, 2018 10:25 pm

How do we determine whether the VSEPR model will be polar or nonpolar? Is it only based on symmetry?

Swetha Ampabathina1I
Posts: 64
Joined: Fri Sep 28, 2018 12:18 am

Re: VSEPR- Polar vs Nonpolar

Postby Swetha Ampabathina1I » Fri Nov 16, 2018 10:32 pm

If the charge distribution of the VSEPR model is symmetric then it is nonpolar, but if it is not symmetric then it would be polar

Danny Elias Dis 1E
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: VSEPR- Polar vs Nonpolar

Postby Danny Elias Dis 1E » Fri Nov 16, 2018 11:52 pm

Also, molecules will be nonpolar if they are diatomic, whether they are VSEPR or not.

Harshita Talkad 4L
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: VSEPR- Polar vs Nonpolar

Postby Harshita Talkad 4L » Sat Nov 17, 2018 2:24 am

A molecule is nonpolar if its atoms have the same electronegativity or if the dipole moments cancel each other out, and it is polar when the dipole moments do not cancel out.

LeannaPhan14BDis1D
Posts: 57
Joined: Fri Sep 28, 2018 12:16 am

Re: VSEPR- Polar vs Nonpolar

Postby LeannaPhan14BDis1D » Sat Nov 17, 2018 4:01 am

are there any more exceptions to the rule of polar and nonpolar with the vespr?

Julia Lee
Posts: 80
Joined: Fri Sep 28, 2018 12:29 am

Re: VSEPR- Polar vs Nonpolar

Postby Julia Lee » Sat Nov 17, 2018 9:59 am

If you draw in the dipole moments (with the arrows) for all elements within a molecule and all dipole moments cancel each other out, than the molecule is nonpolar. If the dipole moments do not cancel each other out, than the molecule is polar. Also professor Lavelle described it in lecture that if a molecule has a preference in orientation when bonding w/ a cation or anion, than it is polar. If it doesn't have a preference in orientation when binding, than it is nonpolar. So when determining polarity of a molecule, it is very helpful to draw out the lewis structure of the molecule and draw in the dipole moments.


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