Bond Angles

This forum topic is for students to self-organize study groups, etc.

Moderators: Chem_Mod, Chem_Admin

Rich Zodda 4B
Posts: 45
Joined: Wed Sep 18, 2019 12:21 am

Bond Angles

Postby Rich Zodda 4B » Sun Nov 17, 2019 10:46 pm

Does anyone know if we have to know the bond angles relative to each other? Like with NH3 and H2O, I'm pretty sure he said we don't need to know the specific bind angles (107 and 104.5), but do we have to know that H2O has a smaller angle than NH3? Or is it enough to know that they're both a little less than 109.5?

AndreiRekesh1I
Posts: 52
Joined: Fri Aug 30, 2019 12:15 am

Re: Bond Angles

Postby AndreiRekesh1I » Sun Nov 17, 2019 10:50 pm

If necessary we could probably reason that H2O has a smaller bond angle than NH3 because the O has two lone pairs, and the interactions between them are stronger than those between bonded atoms so they push the bonds further and squeeze the angle smaller.

JonathanS 1H
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

Re: Bond Angles

Postby JonathanS 1H » Sun Nov 17, 2019 10:50 pm

I don't think we need to know the specific bond angles, but we should know NH3 bond angles are more than H20 angles because we can look at how many bonding pairs there are versus how many lone pairs there are. The bond angles in H20 are less than NH3 because H20 has more lone pair electrons, pushing the bound H towards each other.

Maya Serota 3G
Posts: 53
Joined: Tue Sep 24, 2019 12:17 am

Re: Bond Angles

Postby Maya Serota 3G » Sun Nov 17, 2019 11:07 pm

We just need to know comparisons, not exact bong angles.

Rich Zodda 4B
Posts: 45
Joined: Wed Sep 18, 2019 12:21 am

Re: Bond Angles

Postby Rich Zodda 4B » Sun Nov 17, 2019 11:08 pm

So we do need to know the angles relative to each other, but its never more complicated than lone pair amounts?

Robert Cross 1A
Posts: 35
Joined: Wed Sep 11, 2019 12:15 am

Re: Bond Angles

Postby Robert Cross 1A » Sun Nov 17, 2019 11:08 pm

I think we need to know relatively, but not the exact figure

Ashley Fang 2G
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

Re: Bond Angles

Postby Ashley Fang 2G » Mon Nov 18, 2019 12:04 am

I believe notating it as <109.5 degrees is fine, but if asked you should still know that H2O has a smaller bond angle because of its 2 lone pair-lone pair repulsions, compared to just 1 in NH3.


Return to “Student Social/Study Group”

Who is online

Users browsing this forum: No registered users and 2 guests