Drawing Lewis structures

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cara_Budzinski_3D
Posts: 22
Joined: Sat Jul 09, 2016 3:00 am

Drawing Lewis structures

Postby cara_Budzinski_3D » Fri Oct 21, 2016 1:34 pm

How many bonds are in H3O+ ? I can't figure out a way to draw this structure while following the octet rule. Since H can only bond once, you can't make any double bonds. But since this is an ion with one less electron, you are left with a singule electron that is not bonded on the O, which you can't have (right?). How do you draw the Lewis structure for this molecule?

Yiling Liu 1N
Posts: 25
Joined: Sat Jul 09, 2016 3:00 am

Re: Drawing Lewis structures

Postby Yiling Liu 1N » Fri Oct 21, 2016 2:04 pm

Hydrogen has 1 valence electron.

Oxygen has 6 valence electrons.

H3O+ has 1*3+6-1 valence electrons for a total of 8 valence electrons. I subtracted one because the compound has a 1+ charge.

I drew the structure somewhat like this:

////// H
////// |
////H-- O -- H
////// ..

* you can also add brackets around this structure with a + to signify that it has a 1+ charge

one lone pair and 3 bonding pairs around the central O atom.


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