Strength of ionic and covalent bonds

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Jina Kwon
Posts: 100
Joined: Fri Aug 09, 2019 12:15 am

Strength of ionic and covalent bonds

Postby Jina Kwon » Fri Nov 08, 2019 11:10 am

which one is actually stronger, covalent or ionic bonds?

Madeline Phan 1E
Posts: 103
Joined: Sat Aug 17, 2019 12:18 am

Re: Strength of ionic and covalent bonds

Postby Madeline Phan 1E » Fri Nov 08, 2019 11:41 am

Usually, ionic bonds are stronger because of the higher difference in electronegativity. However, ionic bonds in aqueous solution are actually weaker than covalent bonds because the electronegative regions of the water are attracted to the positive and negative ions in the ionic compound.

Kurtis Liang 3I
Posts: 50
Joined: Sat Aug 24, 2019 12:17 am

Re: Strength of ionic and covalent bonds

Postby Kurtis Liang 3I » Fri Nov 08, 2019 12:10 pm

Ionic bonds are generally stronger than covalent bonds because of the strong attraction between oppositely charged ions.

Timmy Nguyen Dis 1I
Posts: 107
Joined: Sat Aug 17, 2019 12:17 am

Re: Strength of ionic and covalent bonds

Postby Timmy Nguyen Dis 1I » Fri Nov 08, 2019 12:11 pm

Covalent bonds are the strongest. Ionic bonds such as NaCl can get dissociated.

Justin Quan 4I
Posts: 104
Joined: Sat Sep 14, 2019 12:17 am

Re: Strength of ionic and covalent bonds

Postby Justin Quan 4I » Fri Nov 08, 2019 12:17 pm

To add on, if you are comparing ionic and covalent bonds in air or space, then ionic is stronger. However, since water dissociates ionic bonds, for example salt in water, covalent bonds are stronger in aqueous environments.

Miriam Villarreal 1J
Posts: 105
Joined: Sat Aug 17, 2019 12:16 am

Re: Strength of ionic and covalent bonds

Postby Miriam Villarreal 1J » Fri Nov 08, 2019 1:09 pm

In a fully covalent bond, you only have the mixing of the orbitals, as you said. But it's not only that, you also have coulomb interactions between the nuclei, that slightly raise the energy of the molecular orbitals, which results in asymmetric energies.

In a fully ionic bond you also have a coulomb interaction, but this time with the different sign, because you have a positive and a negative charge. These want to be as close together as possible, resulting in a stronger bond.


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