boiling point of ionic compounds

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Victor James 4I
Posts: 50
Joined: Wed Sep 18, 2019 12:20 am

boiling point of ionic compounds

Postby Victor James 4I » Thu Nov 21, 2019 10:25 pm

why would NaCl have a higher boiling point than HCl? (3F.5 part a)

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

Re: boiling point of ionic compounds

Postby Vanessa Chuang 4F » Thu Nov 21, 2019 10:52 pm

NaCl has a higher boiling 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. That means you would need more energy to break apart NaCl than you would for HCl, which results in the higher boiling point of NaCl.

Mashkinadze_1D
Posts: 87
Joined: Sat Aug 24, 2019 12:15 am

Re: boiling point of ionic compounds

Postby Mashkinadze_1D » Thu Nov 21, 2019 10:53 pm

NaCl has a higher boiling point because there is more ionic forces present due to a higher electronegativity difference. The difference between Na and Cl in electronegativity is larger than that of H and Cl making the NaCl molecule be significantly more ionic. This ionic force then causes there to be stronger attraction between the molecules and further a higher boiling point.

Lauren Tanaka 1A
Posts: 109
Joined: Sat Aug 17, 2019 12:18 am

Re: boiling point of ionic compounds

Postby Lauren Tanaka 1A » Fri Nov 22, 2019 9:40 am

NaCl would have a higher boiling point than HCl since it has ion-ion intermolecular forces compared to the dipole-dipole forces of HCl. These ion-ion forces makes the molecule an ionic molecule whereas HCl would be covalent. Therefore, since ionic bonds are stronger specifically ion-ion forces, the bonds will be harder to break apart when boiling leading to a higher boiling point.


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