bond angle

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

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Andrea- 3J
Posts: 56
Joined: Tue Nov 14, 2017 3:00 am

bond angle

Postby Andrea- 3J » Thu Nov 29, 2018 7:43 pm

For a trigonal planar, bent the bond angle is less than 120.
How do I find the exact angle? Is it acceptable that for the test I put >120 for the bond angle?

Patrick Cai 1L
Posts: 93
Joined: Fri Sep 28, 2018 12:25 am

Re: bond angle

Postby Patrick Cai 1L » Thu Nov 29, 2018 7:45 pm

VSEPR does not have methods to find the exact bond angle magnitude (this is determined experimentally), it can tell you the shape and range of what the bond angle could be. Therefore, for the test, you would be only able to write down <120 degrees.

Parth Mungra
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

Re: bond angle

Postby Parth Mungra » Thu Nov 29, 2018 11:13 pm

You cannot find the exact answer. It's something you have to google. However, drawing the lewis structure can tell you if it is less than 120, or 120 or whatever. You won't find the exact number but it will you give an idea of the compound you are looking at.

Meigan Wu 2E
Posts: 66
Joined: Fri Sep 28, 2018 12:29 am
Been upvoted: 1 time

Re: bond angle

Postby Meigan Wu 2E » Thu Nov 29, 2018 11:32 pm

Yes, the approximation of the bond angle is acceptable, so < 120 degrees works.

sarahartzell1k
Posts: 30
Joined: Fri Sep 28, 2018 12:17 am

Re: bond angle

Postby sarahartzell1k » Fri Nov 30, 2018 7:29 am

Since you cannot know the exact angle, <120 is acceptable.

Xingzheng Sun 2K
Posts: 62
Joined: Fri Sep 28, 2018 12:29 am

Re: bond angle

Postby Xingzheng Sun 2K » Mon Dec 03, 2018 8:38 pm

For trigonal planer, the bond angle is exactly 120 degrees. For other shapes, since the lone pair has a stronger force, the bond angle can be slightly smaller than the original angle.

Sapna Ramappa 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:24 am

Re: bond angle

Postby Sapna Ramappa 1J » Wed Dec 05, 2018 4:36 pm

Because you would only be able to find the exact bond angle through an experiment, it's totally fine to put <120 degrees for the test!


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