H-Bonding

[andyjl]

Which of the following participate in hydrogen bonding?
a. methanol
b. methane
c. sodium hydroxide
d. all of the above
e. none of the above.

Now from eliminating answer choices I know that the answer is a. methanol. But however, does sodium hydroxide not participate in hydrogen bonding? Because the OH- can hydrogen bond can it not?

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[Decan]

Sodium hydorxide is held toghether with an ionic bond, not a covalent bond so it will dissociate in water.

 

[jackbauer!]

Sodium hydorxide is held toghether with an ionic bond, not a covalent bond so it will dissociate in water.

exactly.. h-bonding only occurs in molecules NOT compounds.

jb!

 

[jdmsamurai]

H-bond only form in

F-H
O-H
N-H

if you see any of those bondings then its an H-Bond meaning higher boiling temperature and more likely you will see the substance as a liquid....

 

[DentalKitty]

I think what the OP is asking is if the hydroxide ions in solution can H-bond to themselves similar to how water molecules H-bond with themselves. Why couldn't they? They have the O-H bond and lone pairs available on the O. Does anyone know? I've never seen ions/hydroxide discussed when talking about H-bonds. Obviously from the answers to the question it appears they can't, but I'm curious why....

 

[jdmsamurai]

im thinking because the overall charge on the OH isnt neutral...it is a negative hence OH- and therefore in an aq. solution they will repel each other

 

[DentalKitty]

im thinking because the overall charge on the OH isnt neutral...it is a negative hence OH- and therefore in an aq. solution they will repel each other

Yes, that makes sense, thanks!

 

[andyjl]

thanks, my original thought was indeed that since sodium hydroxide is an ionic compound that it wouldn't be involved in H-bonding. Those explanations cleared it up