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Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 11:53 am
by Diana_Diep2I
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?

Re: Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 12:01 pm
by Diana_Diep2I
to rephrase: How can I tell when a molecule has a dipole moment?

Re: Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 12:01 pm
by SnehinRajkumar1L
You can look at the electronegativity of the atoms and molecular shape/geometry.

Re: Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 1:50 pm
by LReedy_3C
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

Re: Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 1:58 pm
by rabiasumar2E
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.

Re: Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 3:11 pm
by Bryce Ramirez 1J
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.

Re: Polar Vs Nonpolar

Posted: Thu Nov 14, 2019 4:33 pm
by 705198479
im still not understanding the difference in determining if a molecule is polar or non polar

Re: Polar Vs Nonpolar

Posted: Sat Nov 16, 2019 12:18 am
by Chetas Holagunda 3H
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.