last problem on midterm

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705160853
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Joined: Fri Sep 28, 2018 12:18 am

last problem on midterm

Postby 705160853 » Thu Nov 15, 2018 1:23 am

on the last problem, how do you know its one double bond and not tow double bonds or the lewis structure?

Brandon Mo 4K
Posts: 70
Joined: Fri Sep 28, 2018 12:15 am

Re: last problem on midterm

Postby Brandon Mo 4K » Thu Nov 15, 2018 2:02 am

I assume that you are referring to Q8A.

If you have two double bonds, it would cause the formal charge on the N to be -1. When you have a negative formal charge, you want to put it on the element with the highest electronegativity, which in this case would be O. You make only one double bond so that you can put the negative formal charge on O, the most electronegative element.

Sarah Zhao 4C
Posts: 64
Joined: Fri Sep 28, 2018 12:28 am

Re: last problem on midterm

Postby Sarah Zhao 4C » Fri Nov 16, 2018 4:55 pm

Nitrogen can only have a maximum of 8 electrons; its in period 2. If you give it two double bonds, it will have 10!

Athena L 1B
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: last problem on midterm

Postby Athena L 1B » Thu Feb 14, 2019 4:22 pm

What was the problem for this one?

Chris Freking 2G
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: last problem on midterm

Postby Chris Freking 2G » Fri Feb 15, 2019 11:28 am

Athena L 1B wrote:What was the problem for this one?


This was question 8A for the Fall 2018 Chem 14A Midterm


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