Structure of H2O

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

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Andrew Jang 4D
Posts: 50
Joined: Sat Aug 17, 2019 12:18 am

Structure of H2O

Postby Andrew Jang 4D » Sun Nov 17, 2019 2:03 pm

I remember in lecture Dr. Lavelle said lone pairs in molecules are usually opposite each other due to the high repulsion. Why is this not the case for water?

Sydney Pell 2E
Posts: 100
Joined: Wed Sep 11, 2019 12:17 am

Re: Structure of H2O

Postby Sydney Pell 2E » Sun Nov 17, 2019 2:11 pm

The lone pairs in H2O are not opposite each other because H2O has four areas of electron density and therefore is in tetrahedral electron geometry. It would not matter which two pairs of electrons are the lone pairs because no matter what the molecular geometry will be bent.

Lauren Sanchez 3D
Posts: 52
Joined: Sat Aug 24, 2019 12:17 am

Re: Structure of H2O

Postby Lauren Sanchez 3D » Sun Nov 17, 2019 2:43 pm

So if there are only two areas of electron density, that is when they are opposite of each other due to the strong repulsion?

Nare Arakelian Dis 3E
Posts: 58
Joined: Thu Jul 11, 2019 12:16 am

Re: Structure of H2O

Postby Nare Arakelian Dis 3E » Sun Nov 17, 2019 2:45 pm

Lauren Sanchez 3D wrote:So if there are only two areas of electron density, that is when they are opposite of each other due to the strong repulsion?


Yes, I believe so because this minimizes the repulsions by putting the lone pairs farthest away from each other


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