Problem 2E # 1 7th edition

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

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Fayez Kanj
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Problem 2E # 1 7th edition

Postby Fayez Kanj » Mon Nov 26, 2018 6:50 pm

The question asks whether a molecule with 180 degree bond angles and only 2 bonded atoms, must have, may have, or cannot have lone pairs. The answer is "may have lone pairs." Why is that?

Kim Tran 1J
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Re: Problem 2E # 1 7th edition

Postby Kim Tran 1J » Mon Nov 26, 2018 6:56 pm

In instances where you have structures with VSEPR formulas of AX2E3 or AX2E4, the molecular shape will be linear.; there are 2 bonded atoms and lone pairs present. However, the lone pair electrons are arranged in such a way that their repulsions cancel out to make the shape linear.

Briana Perez 3A
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Re: Problem 2E # 1 7th edition

Postby Briana Perez 3A » Mon Nov 26, 2018 7:01 pm

When the shape is linear, sometimes the repulsion of the lone pairs will cancel out and therefore not influence the direction of the atoms. In this case, we do not know if there are lone pairs or not because they could be there but just canceled out.


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