Polar/nonpolar  [ENDORSED]

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Postby JulissaLopez1F » Wed Nov 16, 2016 11:40 pm

can someone review the difference between polar and nonpolar molecules?

Kathrin Magdalani 3J
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Re: Polar/nonpolar

Postby Kathrin Magdalani 3J » Thu Nov 17, 2016 1:54 am

Bonds that are partially ionic are polar. Nonpolar bonds have an equal sharing of electrons.

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Re: Polar/nonpolar

Postby Akshay_Manjarekar_3C » Mon Nov 28, 2016 8:24 pm

Another way to look at it is if the molecule as a whole has a dipole moment. A molecule is polar if one side is more negative than the other and it is attracted to the opposite charged side of another molecule.

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Re: Polar/nonpolar

Postby Wenqian_Deng_1L » Sun Dec 04, 2016 8:50 pm

So does that mean we have to draw the Lewis structure of the molecule to see if it has a dipole moment?

emilie liu 3G
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Re: Polar/nonpolar

Postby emilie liu 3G » Sun Dec 04, 2016 9:01 pm

Yes, it helps to draw the Lewis structure to see whether the molecule is polar. This can be done by observing the dipole movements and seeing if they cancel out in a symmetrical molecule.

Dang Lam
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Re: Polar/nonpolar

Postby Dang Lam » Mon Nov 13, 2017 8:31 pm

It has to do with electronegative. A nonpolar bond is a bond arises when the electronegativities of two atom are the same, aka the dipole moment = 0, or they cancels each other out. Polar bond is the opposite of that

Michelle Steinberg2J
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Re: Polar/nonpolar

Postby Michelle Steinberg2J » Mon Nov 13, 2017 9:32 pm

Last year I learned something helpful that has stuck with me!


This says that Symmetrical molecules (determined when you draw the Lewis Structure) are NON polar. Asymmetrical molecules are Polar. Generally this rule holds true.

Susie Lee 2I
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Re: Polar/nonpolar

Postby Susie Lee 2I » Tue Nov 14, 2017 11:25 am

In lecture, Prof. Lavelle discussed that a non-polar molecule must have zero electric dipole movement which is possible if it contains nonpolar bonds, or polar bonds with dipoles that cancel.

Nicole Jacobs 1C
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Re: Polar/nonpolar

Postby Nicole Jacobs 1C » Wed Nov 15, 2017 5:38 pm

can you always use the trick that Lavelle was saying where if water would want to bond on different locations of the molecule, then the molecule is polar for every compound?

Tia Tomescu 2D
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Re: Polar/nonpolar

Postby Tia Tomescu 2D » Wed Nov 15, 2017 9:34 pm

Nicole, yes, that is true for polar molecules.

Daniel Rivas 3L
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Re: Polar/nonpolar

Postby Daniel Rivas 3L » Thu Nov 16, 2017 2:16 pm

Yeah basically of there is an unequal sharing of electrons, it it polar. If there isn't, it is nonpolar.

Jasmin Tran 1J
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Re: Polar/nonpolar

Postby Jasmin Tran 1J » Thu Nov 16, 2017 6:27 pm

Also, an example of a polar molecule would be water, H2O. The O is slightly more negative than the H, giving it a bent shape. An example of a nonpolar molecule would be carbon dioxide, CO2. It is a straight molecule with the C forming double bonds in the middle, so the charges are equally distributed.

Phillip Winters 2F
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Re: Polar/nonpolar

Postby Phillip Winters 2F » Fri Nov 17, 2017 9:16 am

Also, nonpolar molecules are symmetrical while polar molecules are not symmetrical

Yizhou Liu 3L
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Re: Polar/nonpolar

Postby Yizhou Liu 3L » Fri Nov 17, 2017 6:01 pm

A polar molecule forms when an atom of high electronegativity bonds with a less electronegative atom. Conversely, the electrons of a non-polar molecule are distributed more equally.

Madeline Musselman 3H
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Re: Polar/nonpolar  [ENDORSED]

Postby Madeline Musselman 3H » Mon Nov 20, 2017 12:20 pm

Polar has a pull in a certain direction due to electronegativity and nonpolar means that there is no pull due to a balance between elements.

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