H20 to H2S

Moderators: Chem_Mod, Chem_Admin

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

H20 to H2S

Postby Claire_Kim_2F » Tue Nov 17, 2020 4:42 pm

Is h20 to h2s considered a hydrogen bond because the S has a lone pair that can be attached to the h20 which is h-O bond?

Josh Chou 3K
Posts: 95
Joined: Wed Sep 30, 2020 9:48 pm
Been upvoted: 2 times

Re: H20 to H2S

Postby Josh Chou 3K » Tue Nov 17, 2020 5:06 pm

I think only molecules with N-H, O-H, and F-H bonds can form strong hydrogen bonds. This article mentioned that hydrogen bonds between H2O and H2S are "transient," lasting no more than 10 ps, and are weak. https://www.researchgate.net/publicatio ... avior#pf16

Madeline Ogden 3B
Posts: 102
Joined: Wed Sep 30, 2020 10:03 pm
Been upvoted: 1 time

Re: H20 to H2S

Postby Madeline Ogden 3B » Tue Dec 01, 2020 12:36 pm

H2S has no hydrogen bonds while H2O does. Because of this, we're able to explain why water has both a higher boiling and melting point than hydrogen sulphide. (Water's boiling point is 100 degrees Celsius vs hydrogen sulphide's boiling point of only -60 degrees Celsius. Water also has a higher melting point at 0 degrees Celsius vs hydrogen sulphide's melting point at only -86 degrees Celsius.)

Samiha Molla 3G
Posts: 95
Joined: Wed Sep 30, 2020 9:53 pm
Been upvoted: 1 time

Re: H20 to H2S

Postby Samiha Molla 3G » Tue Dec 01, 2020 12:39 pm

I think that there can only be hydrogen bonds when there is an H attached to an N,O, or F that attaches to another N, O, or F that has an available lone pair. I don't think that H2O to H2S would have a hydrogen bond since the lone pair is on an S atom, not an N, O, or F atom.

Nancy Yao
Posts: 62
Joined: Wed Sep 30, 2020 9:38 pm

Re: H20 to H2S

Postby Nancy Yao » Wed Dec 02, 2020 7:00 am

Hydrogen bonding can happen only when the hydrogen is in a polar molecule and the other atom in the hydrogen bonding is electronegative (N, F, O).

I think in this case, water would prefer to form hydrogen bond within itself rather than hydrogen bonding with H2S.


Return to “Interionic and Intermolecular Forces (Ion-Ion, Ion-Dipole, Dipole-Dipole, Dipole-Induced Dipole, Dispersion/Induced Dipole-Induced Dipole/London Forces, Hydrogen Bonding)”

Who is online

Users browsing this forum: No registered users and 1 guest