Dipole moment

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Daniel Rivas 1F
Posts: 15
Joined: Wed Sep 28, 2016 3:02 am

Dipole moment

Postby Daniel Rivas 1F » Fri Oct 21, 2016 1:34 pm

When we're looking to investigate the dipole moment of a compound such as water, it would make sense to find that there are polar covalent bonds involved. As a result of the partial charges distributed among the molecule, it would seem water has distinguishing characteristics. Although it's not directly related to class, would anyone happen to know if there are different degrees of polarity involved in molecules? Are some stronger than others, and if so, what types of physical characteristics would such a compound have?

Theresa Dinh 3F
Posts: 26
Joined: Fri Jul 22, 2016 3:00 am

Re: Dipole moment

Postby Theresa Dinh 3F » Fri Oct 21, 2016 4:56 pm

There are different degrees of polarity, and this arises mostly due to the electronegativity of elements (how strong they pull on the electrons). Oxygen is known for having high electronegativity, which means it pulls it very strongly while H is known for being weaker, which is also why water is a polar molecule because o is taking all the electrons away. however if you have something like o2 which have similar electronegativity, you'll have mostly an equal pull and it will be a weaker degree of polarity in the molecule.

polarity is also determined by shape of the molecule too.

usually those with high polarity can usually create connections with other molecules (eg hydrogen bonds) and create different chemical reactions because of that i think.

isabelle ruedisueli 1j
Posts: 21
Joined: Wed Sep 21, 2016 2:56 pm

Re: Dipole moment

Postby isabelle ruedisueli 1j » Fri Oct 21, 2016 5:05 pm

Hi! I also have a similar question: Why do lone pairs occupy a greater volume than bonding pairs?


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