Polar vs Non polar

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Roni Touboul
Posts: 31
Joined: Fri Sep 28, 2018 12:24 am

Polar vs Non polar

Postby Roni Touboul » Sun Nov 11, 2018 2:36 pm

How do you know when something is polar or non polar? What are some identifying factors used to figure it out?

Lily Benitez 2G
Posts: 63
Joined: Fri Sep 28, 2018 12:29 am

Re: Polar vs Non polar

Postby Lily Benitez 2G » Sun Nov 11, 2018 2:52 pm

To figure out if something is polar or non polar we have to look at the dipole moments. If the dipole moments cancel each other out the compound is non polar. In contrast if there is a strong dipole moment the compound is polar.

mcredi
Posts: 63
Joined: Fri Sep 28, 2018 12:16 am

Re: Polar vs Non polar

Postby mcredi » Sun Nov 11, 2018 3:09 pm

If the electronegativity of two atoms is basically the same, a nonpolar covalent bond will form, and if the electronegativity is slightly different, a polar covalent bond will form.

Jaqueline Monreal 2L
Posts: 57
Joined: Fri Sep 28, 2018 12:28 am

Re: Polar vs Non polar

Postby Jaqueline Monreal 2L » Sun Nov 11, 2018 4:29 pm

polar molecules result from polar bonding between atoms where electrons are not shared equally
atoms from the same element do not form polar bonds because they share electrons equally
the greater the difference in electronegativity then the more ionic the bond is and bonds that have ionic bonds
nonpolar covalent bonds happen when the two atom's electronegativities are equal

905096106
Posts: 30
Joined: Fri Oct 05, 2018 12:17 am

Re: Polar vs Non polar

Postby 905096106 » Sun Nov 11, 2018 7:57 pm

Polar versus nonpolar is very difficult to determine but it is based off of the difference in electronegativity between the atoms in a molecule. usually if the molecule is very symmetrical with its lewis dot structure then it will be nonpolar.

davidbakalov_lec2_2L
Posts: 61
Joined: Fri Sep 28, 2018 12:23 am

Re: Polar vs Non polar

Postby davidbakalov_lec2_2L » Sun Nov 11, 2018 8:02 pm

A quick rule of thumb to determine the polarity of a molecule is to look at how symmetrical it is. If the arrangement of the atoms is symmetrical, it will most likely be non polar.

Andrew Bennecke
Posts: 62
Joined: Fri Sep 28, 2018 12:15 am

Re: Polar vs Non polar

Postby Andrew Bennecke » Mon Nov 12, 2018 10:02 am

To tell whether a molecule is polar or nonpolar, one could look at whether or not the dipoles cancel, the electronegativity, and whether or not the electron pull of each atom is symmetrical. For example, in F2, the electrons of each F atom have the same pull, so it is a nonpolar molecule. However, in HCl, the Cl has a much stronger pull than the H, so this would be a polar covalent bond.

Nawaphan Watanasirisuk 3B
Posts: 58
Joined: Tue Nov 28, 2017 3:03 am

Re: Polar vs Non polar

Postby Nawaphan Watanasirisuk 3B » Wed Nov 14, 2018 3:52 pm

It depends on the difference in electronegativity of the atoms. C-H for example have similar electronegativity and therefore is nonpolar because electrons are shared equally between the 2 atoms.

Angela Grant 1D
Posts: 67
Joined: Fri Sep 28, 2018 12:25 am

Re: Polar vs Non polar

Postby Angela Grant 1D » Wed Nov 14, 2018 3:56 pm

This is what my high school chem teacher taught us: "A molecule with a uniform distribution of electron density is nonpolar; and one with an asymmetrical distribution is polar. A molecule is nonpolar only if it has no lone pair electrons about the central atom and all groups attached to the central atom are identical (both conditions must be met to be nonpolar). Another way to state this is if the electron group and molecular shapes are the same and the atoms attached to the central atom are identical, then the molecule is nonpolar."

mbaker4E
Posts: 69
Joined: Fri Sep 28, 2018 12:26 am

Re: Polar vs Non polar

Postby mbaker4E » Wed Nov 14, 2018 4:14 pm

The molecule will most likely be polar if there are different atoms around the central atom. A molecule will most likely be nonpolar if the molecule is symmetrical and has the same atoms around the central atom.

Nina Do 4L
Posts: 61
Joined: Fri Sep 28, 2018 12:27 am

Re: Polar vs Non polar

Postby Nina Do 4L » Wed Nov 14, 2018 5:13 pm

When you determine that the atom is polar or non polar (from the previous comments), the direction of polarity points to the atom that is most electromagnetic! :)

705022748
Posts: 26
Joined: Fri Sep 28, 2018 12:25 am

Re: Polar vs Non polar

Postby 705022748 » Thu Nov 15, 2018 9:10 pm

To determine whether or not a molecule is polar or nonpolar, you have to consider the electronegativity between atoms, and if the atoms are symmetrical, it would most likely be nonpolar.


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