Textbook 4.21 part d

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

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Or Fisher 1I
Posts: 35
Joined: Fri Feb 02, 2018 3:00 am

Textbook 4.21 part d

Postby Or Fisher 1I » Sun Jun 03, 2018 3:03 pm

Hello, during discussion section my TA told us that we do not need to know specific angles for things besides the 6 basic structures if they were all bonded electron pairs. However, the answer to this problem in the solutions manual is 107 for the N2H4 molecule. Do we have to be able to write this or can we just say it is less than 109.5? Thanks.

Alma Flores 1D
Posts: 64
Joined: Wed Nov 08, 2017 3:01 am

Re: Textbook 4.21 part d

Postby Alma Flores 1D » Sun Jun 03, 2018 3:22 pm

Dr. Lavelle replied to another student saying to write slightly less than 109.5 since students are not expected to know the exact (experimentally measured) bond angles for individual molecules.

Madison Hacker 1L
Posts: 30
Joined: Fri Apr 06, 2018 11:03 am

Re: Textbook 4.21 part d

Postby Madison Hacker 1L » Sun Jun 03, 2018 7:16 pm

We only need to know when it is slightly less than 109.5 vs 109.5 because we cannot actually calculate the degree exactly.

SammiOrsini_1B
Posts: 45
Joined: Fri Apr 06, 2018 11:04 am

Re: Textbook 4.21 part d

Postby SammiOrsini_1B » Sun Jun 03, 2018 9:02 pm

For clarification, since a bond angle of 109.5 refers to a tetrahedral, is a bond angle that is slightly less than 109.5 caused by lone pairs on the central atom? Do bond angles decrease due to lone pairs?


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