Sapling Hw Urea Question

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Claire_Kim_2F
Posts: 67
Joined: Wed Sep 30, 2020 10:02 pm

Sapling Hw Urea Question

Postby Claire_Kim_2F » Fri Nov 13, 2020 3:50 pm

I was wondering why the answer for the urea questions 8 bonds.

Jiwon_Chae_3L
Posts: 88
Joined: Wed Sep 30, 2020 9:39 pm

Re: Sapling Hw Urea Question

Postby Jiwon_Chae_3L » Fri Nov 13, 2020 4:19 pm

Hey Claire, one urea molecule can form 8 different hydrogen bonds with water molecules because the partially charged oxygen atoms in the water molecules can form hydrogen bonds with the 4 partially charged hydrogen atoms on the urea molecule (the N-H branches), and the partially charged hydrogen atoms on the water molecules can form hydrogen bonds with the 2 nitrogen atoms in urea as well as the 2 lone pairs on the single oxygen atom in the urea molecule. Adding these up, urea can potentially form 8 hydrogen bonds with water.

Reese_Gover2K
Posts: 50
Joined: Wed Sep 30, 2020 9:39 pm

Re: Sapling Hw Urea Question

Postby Reese_Gover2K » Sat Nov 14, 2020 5:37 pm

The number is 8 because, since Hydrogen bonds occur with N,O, and F atoms, the Oxygen can bond with 2 water molecules, the 4 Hydrogens can each bond with one water molecule, and each Nitrogen can bond with one molecule so if you add up all of those bonds you get 8.


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