Bond Angles

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

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David Zhang 1B
Posts: 48
Joined: Mon Jun 17, 2019 7:23 am

Bond Angles

Postby David Zhang 1B » Sun Jul 21, 2019 3:24 pm

Would we have to know how to predict bond angles based on the shape of a molecule on a test?

MedhaVallurupalli1F
Posts: 30
Joined: Wed Feb 27, 2019 12:15 am

Re: Bond Angles

Postby MedhaVallurupalli1F » Sun Jul 21, 2019 4:05 pm

I think Professor Lavelle mentioned that we would need to know the "ideal bond angles" (ex. 180, 90, 109.5, etc.) but not the more specific ones that would be given.

Yilun Ding
Posts: 31
Joined: Tue Jun 25, 2019 12:15 am

Re: Bond Angles

Postby Yilun Ding » Sun Jul 21, 2019 5:32 pm

We need to identify the shape by using the models mentioned in class. For centain type of model, we have to name the angles of its typical examples. Therefore, we should be able to name the shape and some basic angles.

Sisi Li 1F
Posts: 34
Joined: Mon Mar 11, 2019 12:15 am

Re: Bond Angles

Postby Sisi Li 1F » Sun Jul 21, 2019 8:16 pm

Yes, you'd have to predict angles such as 109.5, 90, and 180. For elements in which areas of electron density are lone pairs instead of bonding pairs, the angles will change, but you won't need to know the exact angle, just know whether it's greater or less than the known angles. For example, a tetrahedral with 4 bonding pairs, the angles would be 109.5, but if one of the pairs is a lone pair, then the angle would be less than 109.5


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