VSEPR Angles

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

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VSEPR Angles

Postby DTingey_1C » Sun Nov 17, 2019 6:36 pm

Is it necessary that we know the exact angles created by each of the different molecular shapes?

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Re: VSEPR Angles

Postby zoedfinch1K » Sun Nov 17, 2019 6:42 pm

I think for the general shapes we are expected to know the bond angles but for cases where there are lone pairs on the central atom, we just need to know what the impact on the original bond angle would be.

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Re: VSEPR Angles

Postby RasikaObla_4I » Sun Nov 17, 2019 7:00 pm

We should know the bond angles for the shapes that do not have lone pairs because the angles are constant. However, for the shapes with lone pairs, we need to know that the bond angles for trigonal pyramidal are less than 109.5 degrees.

Bradley Whitworth 4B
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Re: VSEPR Angles

Postby Bradley Whitworth 4B » Sun Nov 17, 2019 7:21 pm

Usually for VSEPR exact angles for everything is not expected. You should know the basic ones like 180 degrees, 120 degrees, and 109.5 degrees and you should know how lone pairs affect bonds which would be indicated by writing something like <109.5 degrees for example.

Jordan Ziegler 2J
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Re: VSEPR Angles

Postby Jordan Ziegler 2J » Sun Nov 17, 2019 7:24 pm

A followup question:

How do we determine if the bond angles are greater than or less than 109.5 degrees (or 90 degrees or 120 degrees)?

Do lone pairs repel more than bonding sites?

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