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Polar vs. Non-polar

Posted: Tue Nov 27, 2018 7:17 pm
by Nadeen 3D
Are we able to distinguish a molecule polar or non-polar if there is an ion? Because when I was doing practice problems, when distinguishing polarity a lot of the answers said n/a. So does that mean we do not know whether the molecule is polar vs. nonpolar?

Re: Polar vs. Non-polar

Posted: Tue Nov 27, 2018 7:53 pm
by Ricky Ma DIS 4E
Just think about the net dipoles and whether they cancel. You have to take in account the shape of the molecule.

Re: Polar vs. Non-polar

Posted: Tue Nov 27, 2018 10:29 pm
by Erin Nash - 4G
When deciding whether a molecule is polar or nonpolar you must look at the shape to see the dipoles. If there are no dipoles, then it is nonpolar or if the dipoles cancel out then it is nonpolar. If the dipoles are uneven (large difference in electronegativity) then the molecule is polar.

Re: Polar vs. Non-polar

Posted: Tue Nov 27, 2018 11:01 pm
by Aiden Atoori 1C
A good trick to distinguish polar and no polar is by drawing a Lewis structure and using the following rules.
1.It is non polar if there are no lone pairs and if all the attached structures are the same.

Re: Polar vs. Non-polar

Posted: Tue Nov 27, 2018 11:05 pm
by Destiny Diaz 4D
How would you find the dipoles in this case ?

Re: Polar vs. Non-polar

Posted: Tue Nov 27, 2018 11:16 pm
by Nicolle Fernandez 1E
If you were to draw the Lewis structure then you would be able to tell which molecules are polar or not

Re: Polar vs. Non-polar

Posted: Tue Nov 27, 2018 11:53 pm
by Arlene Linares 3A
Ricky Ma DIS 4I wrote:Just think about the net dipoles and whether they cancel. You have to take in account the shape of the molecule.



Thank you for the information.