HW# 2E.26

(Polar molecules, Non-polar molecules, etc.)

Moderators: Chem_Mod, Chem_Admin

Jessica Tejero 3L
Posts: 54
Joined: Wed Sep 25, 2019 12:16 am

HW# 2E.26

Postby Jessica Tejero 3L » Sun Nov 17, 2019 7:41 pm

Draw the Lewis structure and predict whether each of the
following molecules is polar or nonpolar: (a) H2Se; (b) AsF5;
(c) SiO2; (d) NF3.

Any easy rules to remember to find out if a molecule is polar or nonpolar?

405318478
Posts: 90
Joined: Sat Jul 20, 2019 12:16 am

Re: HW# 2E.26

Postby 405318478 » Sun Nov 17, 2019 7:44 pm

If a molecule is polar, this is an uneven charge distribution. Meaning, the molecule does not have an even distribution of charges. A quick trick is to look at the actual structure of the molecule, looking for symmetry. Symmetric molecules tend to be non-polar. However, the most sure way is to look at electronegativity differences.

Anna Chen 1K
Posts: 104
Joined: Thu Jul 25, 2019 12:18 am

Re: HW# 2E.26

Postby Anna Chen 1K » Sun Nov 17, 2019 8:03 pm

Yes, I agree that the symmetry of a lewis structure can sometimes help in determining polarity, but the most accurate way would be to evaluate electronegativity differences.


Return to “Determining Molecular Shape (VSEPR)”

Who is online

Users browsing this forum: No registered users and 1 guest