HCL vs NaCl

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Ayush Ray 1I
Posts: 53
Joined: Sat Sep 14, 2019 12:15 am

HCL vs NaCl

Postby Ayush Ray 1I » Wed Nov 20, 2019 6:36 pm

Can somebody please explain why NaCl has a higher melting point than HCl

haileyramsey-1c
Posts: 105
Joined: Thu Jul 25, 2019 12:18 am

Re: HCL vs NaCl

Postby haileyramsey-1c » Wed Nov 20, 2019 6:44 pm

NaCl has a very large difference in electronegativity compared to HCl resulting is stronger dipole dipole forces. Also, NaCl is larger and has more electrons than hydrogen therefore has stronger London dispersion forces. Since, both of these intermolecular forces are stronger than those in HCl, the melting point for NaCl is higher because it would requires more energy to break the forces.

Vanessa Chuang 4F
Posts: 51
Joined: Sat Aug 24, 2019 12:18 am

Re: HCL vs NaCl

Postby Vanessa Chuang 4F » Wed Nov 20, 2019 6:45 pm

NaCl has a higher melting point than HCl because it is ionic vs HCl which is not. Ion-ion bonds are always more strongly held together than non ion-ion bonds which means you need more energy to break apart NaCl. This results in a higher melting point.

Jorge Ramirez_4H
Posts: 54
Joined: Wed Nov 21, 2018 12:19 am

Re: HCL vs NaCl

Postby Jorge Ramirez_4H » Wed Nov 20, 2019 7:04 pm

What is melting point based on?

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

Re: HCL vs NaCl

Postby Tyler Angtuaco 1G » Wed Nov 20, 2019 7:21 pm

Ion-ion interactions are stronger than the dipole-dipole interactions of HCl, so it takes more energy (heat) to overcome ion-ion forces.

Matt Sanruk 2H
Posts: 131
Joined: Wed Sep 18, 2019 12:21 am

Re: HCL vs NaCl

Postby Matt Sanruk 2H » Wed Nov 20, 2019 7:48 pm

So all ionic compounds will have higher imf, boiling and freezing points than any covalent molecule, right?

Michelle Le 1J
Posts: 50
Joined: Fri Aug 09, 2019 12:16 am

Re: HCL vs NaCl

Postby Michelle Le 1J » Wed Nov 20, 2019 9:38 pm

Matt Sanruk 4F wrote:So all ionic compounds will have higher imf, boiling and freezing points than any covalent molecule, right?

Yes, ionic compounds have the strongest intermolecular forces compared to the covalent molecules, as well as they generally have higher boiling and melting points.


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