HW# 2E.26

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

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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?

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.

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