Lewis Structures

Moderators: Chem_Mod, Chem_Admin

Michael Du 1E
Posts: 117
Joined: Sun Sep 22, 2019 12:16 am

Lewis Structures

Postby Michael Du 1E » Sat Nov 02, 2019 10:42 pm

When a problem asks to draw the lewis structure of a molecule, are we expected to draw the one with the lowest energy or only when the problem says to?

gabbymaraziti
Posts: 111
Joined: Wed Sep 18, 2019 12:19 am

Re: Lewis Structures

Postby gabbymaraziti » Sat Nov 02, 2019 10:43 pm

I think we're supposed to draw the one that is the most stable, i.e. lowest formal charges for each atom (I think that's what you're referring to by 'lowest energy').

gferg21
Posts: 51
Joined: Sat Aug 17, 2019 12:17 am

Re: Lewis Structures

Postby gferg21 » Sat Nov 02, 2019 10:49 pm

The most stable configuration of a molecule is the one with the lowest formal charge, so I would say to always draw the the most stable unless told otherwise.

Ixcel Guzman 4A
Posts: 16
Joined: Wed Sep 25, 2019 12:17 am

Re: Lewis Structures

Postby Ixcel Guzman 4A » Sat Nov 02, 2019 10:50 pm

I think its the one with the lowest energy and ive been hearing that we also have to draw all the resonance structures but I remember Lavelle saying that he would take any structure.

Vivianvelazquez_1J
Posts: 109
Joined: Thu Jul 11, 2019 12:17 am
Been upvoted: 1 time

Re: Lewis Structures

Postby Vivianvelazquez_1J » Sat Nov 02, 2019 11:02 pm

When we are asked to draw a Lewis structure of a molecule the best thing to do is usually draw the structure with the lowest formal change. Always drawing the structure that is the most stable. In the Dino Nuggets review session they said the most stable is always the best.

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

Re: Lewis Structures

Postby Tyler Angtuaco 1G » Sat Nov 02, 2019 11:20 pm

It's probably safer to write all of the resonance structures unless it specifically states the one with the lowest energy.

805422680
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Lewis Structures

Postby 805422680 » Sun Nov 03, 2019 12:13 am

The one with the lowest energy will always be correct so it safer to draw that and all it’s resonant structures.

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Lewis Structures

Postby kristi le 2F » Sun Nov 03, 2019 12:17 am

Also, you can check which Lewis structure has the lowest energy by checking the formal charges. You want the most neutral/nonzero charges as possible.

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

Re: Lewis Structures

Postby Justin Quan 4I » Sun Nov 03, 2019 5:38 pm

When we draw lewis structures, should we always assume to draw the resonance structures even if the problem didn't say to do so?

Caitlin Ciardelli 3E
Posts: 44
Joined: Wed Sep 18, 2019 12:19 am

Re: Lewis Structures

Postby Caitlin Ciardelli 3E » Sun Nov 03, 2019 6:01 pm

In one of the review sessions, they mentioned that you should always aim to draw the Lewis Structure with the lowest energy. You only need to draw the resonance structures if the questions asks for them.


Return to “Lewis Structures”

Who is online

Users browsing this forum: No registered users and 6 guests