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Molecular Shape and Polarity

Posted: Fri Nov 22, 2019 12:20 am
by Jasmine 2C
Does polarity of atoms in a molecule not affect its molecular shape?

Re: Molecular Shape and Polarity

Posted: Fri Nov 22, 2019 12:23 am
by Micah3J
I think it just affects the bond angles between the atoms but I could be wrong.

Re: Molecular Shape and Polarity

Posted: Fri Nov 22, 2019 1:54 am
by Tiffany Chao 2H
If you're talking about a molecule like CHCl3, it's polar. However, the polarity of it doesn't affect the fact that its tetrahedral and all bond angles are 109.5 degrees. The only time bond angles/shape is affected would be due to lone pairs.

Re: Molecular Shape and Polarity

Posted: Fri Nov 22, 2019 2:08 am
by Jocelyn Thorp 1A
the shape affects the polarity (due to the possibility of dipole moments cancelling), but as far as i know it doesn't work the other way around

Re: Molecular Shape and Polarity

Posted: Fri Nov 22, 2019 10:44 am
by Miriam Villarreal 1J
if all the outer atoms are the same and symmetric, the dipole moments cancel each other out and become nonpolar. However, a molecule with an unsymmetric shape will be (at least slightly) polar. Additionally lone pair or pairs of electrons on the central atom guarantee a nonuniform distribution of electrons. In terms of polarity affecting shape, it is mainly due to areas of electron density that determine a shape.

Re: Molecular Shape and Polarity

Posted: Fri Nov 22, 2019 11:10 am
by KMenjivar_3A
Polarity does affect the shape of the lewis structure. Lone pairs decreases the bond angle due to electron-electron repulsion. As a result, the structure of the molecule will change.