Polar Vs Nonpolar

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Diana_Diep2I
Posts: 130
Joined: Sat Aug 17, 2019 12:17 am

Polar Vs Nonpolar

Postby Diana_Diep2I » Thu Nov 14, 2019 11:53 am

How can we tell if a molecule is polar or nonpolar? For example: CH2Cl2. How would I be able to find the forces that occur between that molecule besides London forces?

Diana_Diep2I
Posts: 130
Joined: Sat Aug 17, 2019 12:17 am

Re: Polar Vs Nonpolar

Postby Diana_Diep2I » Thu Nov 14, 2019 12:01 pm

to rephrase: How can I tell when a molecule has a dipole moment?

SnehinRajkumar1L
Posts: 101
Joined: Thu Jul 11, 2019 12:15 am

Re: Polar Vs Nonpolar

Postby SnehinRajkumar1L » Thu Nov 14, 2019 12:01 pm

You can look at the electronegativity of the atoms and molecular shape/geometry.

LReedy_3I
Posts: 51
Joined: Fri Aug 30, 2019 12:17 am

Re: Polar Vs Nonpolar

Postby LReedy_3I » Thu Nov 14, 2019 1:50 pm

Also, if the shape/geometry of a molecule is even (like CH4 where they are spread equally around the central atom) it will not be polar because the charge/electronegativity is equal on all sides

rabiasumar2E
Posts: 108
Joined: Thu Jul 11, 2019 12:15 am

Re: Polar Vs Nonpolar

Postby rabiasumar2E » Thu Nov 14, 2019 1:58 pm

A polar molecule occurs when the molecule is not symmetric, i.e. when one side has a positive charge and the other side has a negative charge.

Bryce Ramirez 1J
Posts: 120
Joined: Sat Aug 24, 2019 12:16 am

Re: Polar Vs Nonpolar

Postby Bryce Ramirez 1J » Thu Nov 14, 2019 3:11 pm

Drawing the Lewis Structure really helps because then you can visually see where the signs are coming from, if there are no charges then you would see it from the molecule being drawn and if there are charges they can easily be labeled on the Lewis Structure and understood why they are there.

705198479
Posts: 55
Joined: Wed Sep 18, 2019 12:20 am

Re: Polar Vs Nonpolar

Postby 705198479 » Thu Nov 14, 2019 4:33 pm

im still not understanding the difference in determining if a molecule is polar or non polar

Chetas Holagunda 3H
Posts: 51
Joined: Thu Jul 11, 2019 12:17 am
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Re: Polar Vs Nonpolar

Postby Chetas Holagunda 3H » Sat Nov 16, 2019 12:18 am

Also, you can draw the vectors of the dipole moments to see if they cancel in each direction. Usually, if more than two elements are used in a molecule that isn't balanced on each side, it is polar.


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