AX2E2

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Phoebe Chen 4I
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Joined: Fri Sep 28, 2018 12:29 am

AX2E2

Postby Phoebe Chen 4I » Thu Nov 29, 2018 11:46 am

Molecules with the VSEPR formula AX2E2 would have bond angles of 109.5 or less than 109.5?

Megan Gianna Uy 3L
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Joined: Fri Sep 28, 2018 12:26 am

Re: AX2E2

Postby Megan Gianna Uy 3L » Thu Nov 29, 2018 11:52 am

Molecules with the molecular formula AX2E2 have four regions of electron density so its electron geometry would be tetrahedral. Its molecular geometry would be bent with a bond angle of <<109.5.

Michael Nirula
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Joined: Fri Sep 28, 2018 12:27 am

Re: AX2E2

Postby Michael Nirula » Thu Nov 29, 2018 2:28 pm

Yes, bent molecular geometry with bond angles less than 109.5

Nicole Lee 4E
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Re: AX2E2

Postby Nicole Lee 4E » Thu Nov 29, 2018 2:41 pm

Its bond angles are less than 109.5 because of the presence of lone pairs.

Danny Zhang 4L
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Re: AX2E2

Postby Danny Zhang 4L » Thu Nov 29, 2018 5:33 pm

The VESPR formula AX2E2 suggests that the shape of the molecule is bent/angular, which means that the bond angles are less than 109.5 degrees.

Carlos De La Torre 2L
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Joined: Tue Oct 09, 2018 12:16 am

Re: AX2E2

Postby Carlos De La Torre 2L » Thu Nov 29, 2018 11:07 pm

a molecule with formula AX2E2 will have a bond angle >>109.5 as the lone pairs repulse the atoms more that atoms repulse atoms, however a molecule with formula AX4E2 will have bond angles at exactly 90 degrees as the lone pair-atom repulsion will cancel out.

Elle_Mendelson_2K
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Re: AX2E2

Postby Elle_Mendelson_2K » Thu Nov 29, 2018 11:23 pm

On the exam, will we need to write << or can we just write < ?

g orloff 1J
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Re: AX2E2

Postby g orloff 1J » Fri Nov 30, 2018 12:35 am

The bond angles will be less than 109.5 due to the lone pairs pushing harder than the bound atoms.

Katie_Duong_1D
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Re: AX2E2

Postby Katie_Duong_1D » Fri Nov 30, 2018 1:52 am

AX2E2 would have a bond angle of less than 109.5 degrees. A molecule with this VSEPR formula has 4 regions of electron density: 2 shared and 2 lone pairs. The electron geometry is tetrahedral, but the molecular geometry is bent because the 2 lone pairs on the central atom would slightly bring the atoms closer to each other. This would mean that the bond angle is less than 109.5 degrees, instead of 109.5 degrees exactly.

Karina Jiayu Xu 4E
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Re: AX2E2

Postby Karina Jiayu Xu 4E » Sun Dec 02, 2018 5:53 pm

Because the lone pairs are more negative than an atom, it pushes harder on the two bonded atoms, thus making the angle between them less than 109.5.

Avery Zuelch 1D
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Joined: Fri Sep 28, 2018 12:18 am

Re: AX2E2

Postby Avery Zuelch 1D » Wed Dec 05, 2018 9:42 am

what would make the bond angles equal to 109.5? or are they always less than it?

Madison Gil 3D
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Joined: Fri Sep 28, 2018 12:23 am

Re: AX2E2

Postby Madison Gil 3D » Wed Dec 05, 2018 11:34 am

A molecule with a VSEPR formula of AX2E2 would have a bent or v-shaped structure of atoms. A molecule with 4 things coming off of it (tetrahedral) would have bond angles of 109.5, but since two of these are lone pairs of electrons, the electrons will push other atoms away from it, lowering the bond angle from 109.5 to <<109.5.

Arshia Ramesh 1G
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Re: AX2E2

Postby Arshia Ramesh 1G » Wed Dec 05, 2018 12:06 pm

the bond angle should be less than 109.5 because of the lone pair repulsion

Stevin1H
Posts: 89
Joined: Fri Sep 28, 2018 12:17 am

Re: AX2E2

Postby Stevin1H » Thu Dec 06, 2018 10:08 am

The VSEPR formula of AX2E2 suggests that the molecular shape will be bent, though it has 4 electron density regions. And for 4 electron density regions, it suggests the electron pair geometry would be tetrahedral, which has bond angles of 109.5. But for AX2E2, it has lone pairs so the bond angles will be slightly less than 109.5.

Ricardo Martin 1J
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Joined: Fri Sep 28, 2018 12:15 am

Re: AX2E2

Postby Ricardo Martin 1J » Thu Dec 06, 2018 10:25 am

Yes this is a bent shape with bond angles less than 109.5


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