George asks…
Hydrogen bonding?
Does HCl form any hydrogen bonds? I know that hydrogen bonding occurs when hydrogen is bonded to a very electronegative atom like fluorine, oxygen, or nitrogen. But I was wondering whether there would be hydrogen bonding in hydrogen chloride since chlorine does have a high electronegativity. Infact, I believe chlorine and nitrogen have the same electronegativity so I suppose it would form hydrogen bonds.
admin answers:
The Cl atom is too big. HCl is generally considered not to have any hydrogen bonding.
Mark asks…
Hydrogen Bonding?
Can there be two hydrogen bonds between two molecules of NH3? For instance, one of hyrdogen from one NH3 molecule bonds through hydrogen bonding with the nitrogen (N) of te second molecule. And then one of the hydrogens from the second molecule connects with the nitrogen atom of the first molecule. Is this possible? Why?
Thanks,
the Gibbler
admin answers:
This of what the Ammonia molecule looks like…draw its Lewis structure,
http://upload.wikimedia.org/wikipedia/commons/1/11/Ammonia-2D-dimensions.png
If you have two molecules of Ammonia, the slightly + Hydrogen’s will be attracted to the slightly – Nitrogen side of the molecule so it will orient it self to as to form the closest arrangement possible.
However, when the H and N atoms are lined up with each other on different molecules, the other N and H atoms a pointing away from each other.
So no, both sides of two different NH3 molecules will not attract each other at the same time.
Ken asks…
hydrogen bonding?
why is hydrogen bonding so strong?
admin answers:
Because hydrogen bonds are generally short. The shorter a bond is, the stronger it is, because it’s more tight knit and less susceptible to being broken apart.
Ruth asks…
How does hydrogen bonding explain water ability to absorb large amounts of energy before evaporating?
Hydrogen bonding occurs between water molecules. What is it about hydrogen bonding?
admin answers:
Hydrogen bond are very very strong, much stronger than the dipole bonding and the Van Der Waals bonding. Becuase of their strength they require a lot of energy to break. Since water has hydrogen bonds are the intermolecular forces in water, you need a lot of energy before you can break them, and incidently if you do break the hydrogen bonds you have just made the water boil.
[hydrogen bonds are very strong because of great electronegativity differences between the elements in a molecule.]
Maria asks…
What is the importance of hydrogen bonding in the overall structure of proteins?
Correct me if I’m wrong but this is what I know…
Hydrogen bonding is what happens in secondary structure and if that didn’t happen then the protein would not be able to exist.
Could someone please explain it a little more for me?
admin answers:
“Hydrogen bonding is what happens in secondary structure and if that didn’t happen then the protein would not be able to exist.”
This is a good statement you’ve made, but it’s missing something important. “…would not be able to exist IN ITS CORRECT 3-DIMENSIONAL SHAPE.” Those hydrogen bonds are necessary because they help to hold the protein in its 3-D shape, which is necessary for its normal functioning.
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