Drawing Lewis Structures on the Final Exam

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Brynne Keyser 1B
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Joined: Fri Apr 06, 2018 11:03 am

Drawing Lewis Structures on the Final Exam

Postby Brynne Keyser 1B » Wed Jun 06, 2018 7:30 pm

When we draw Lewis structures on the final exam, do the bond angles need to be accurate?

Thank you!

Odalys Cuevas 1C
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Joined: Fri Apr 06, 2018 11:02 am

Re: Drawing Lewis Structures on the Final Exam

Postby Odalys Cuevas 1C » Wed Jun 06, 2018 8:08 pm

I remember hearing that you don't have to be exactly accurate when drawing them since it can get tricky, but you should know what the angles are for the shapes in the VSEPR structure if you are asked for them. For example for AX3 its trigonal planar and has bond angles of 120.

AshleyLamba1H
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Joined: Fri Apr 06, 2018 11:03 am

Re: Drawing Lewis Structures on the Final Exam

Postby AshleyLamba1H » Sun Jun 10, 2018 12:21 am

I'm pretty sure that when you state the bond angles for structures that have lone pairs (which decrease bond angle size), you can just say that the bond angles are "less than [blank] degrees." For example, for the molecule SnCl2, the VSEPR structure is AX2E, and the bond angle is <120 degrees.

Allen Chen 1J
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Joined: Wed Nov 15, 2017 3:04 am

Re: Drawing Lewis Structures on the Final Exam

Postby Allen Chen 1J » Sun Jun 10, 2018 4:18 pm

The bond angles without lone pairs need to be accurate but as you add lone pair repulsion it becomes impossible to know exact angle so you can only say less than x degrees. I think

ErinKim1I
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Joined: Fri Apr 06, 2018 11:03 am

Re: Drawing Lewis Structures on the Final Exam

Postby ErinKim1I » Sun Jun 10, 2018 6:45 pm

I'm not sure if bond angles really matter for a lewis structure... I was told that they are important mostly for VSEPR, b/c that represents a 3D space.

Vivian Gonzalez 1A
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Joined: Fri Apr 06, 2018 11:03 am

Re: Drawing Lewis Structures on the Final Exam

Postby Vivian Gonzalez 1A » Sun Jun 10, 2018 7:02 pm

Bond angles do not have to be accurate for lewis structure and if I remember correctly we will not be asked to draw the shapes for VSEPR. We just need to know the names of the shapes and the bond angles


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