Polar & Nonpolar

(Polar molecules, Non-polar molecules, etc.)

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804991762_4A
Posts: 47
Joined: Fri Apr 06, 2018 11:04 am

Polar & Nonpolar

Postby 804991762_4A » Fri May 25, 2018 2:46 pm

In determining whether a molecule is polar or nonpolar, how do you know the charges of each atoms?

Sunjum Singh 1I
Posts: 30
Joined: Fri Apr 06, 2018 11:05 am

Re: Polar & Nonpolar

Postby Sunjum Singh 1I » Fri May 25, 2018 5:11 pm

It's based on the atoms electronegativity. So in the case of H20, we know oxygen is more electronegative(wanting more electrons) than hydrogen, so electrons are going to be pulled more towards oxygen. This causes hydrogen to become slightly positive and oxygen to be more negative. This is why H20 is a polar bond.

John Miller-1I
Posts: 29
Joined: Fri Apr 06, 2018 11:04 am

Re: Polar & Nonpolar

Postby John Miller-1I » Fri May 25, 2018 9:05 pm

To elaborate on the above on how to determine which element will be more positive/negative, you can look at a periodic table with electronegativity listed. The element that is more electronegative will attract electrons the most and therefore be partially negative in a polar bond

Neha Divi 1K
Posts: 31
Joined: Fri Apr 06, 2018 11:02 am

Re: Polar & Nonpolar

Postby Neha Divi 1K » Sat May 26, 2018 5:10 pm

In addition, we learned in class on Friday that a polar molecule must have polar bonds with dipoles that do not cancel and that a non polar molecule must have zero electric dipole moment which is possible if it contains non polar bonds or polar bonds with dipoles that cancel.


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