Polar Bonds vs. Polar Molecules  [ENDORSED]

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

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Rakhi Ratanjee 1D
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Joined: Fri Sep 29, 2017 7:04 am

Polar Bonds vs. Polar Molecules

Postby Rakhi Ratanjee 1D » Sat Nov 11, 2017 2:04 pm

What is the difference between polar bonds and polar molecules?

Nisarg Shah 1C
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Re: Polar Bonds vs. Polar Molecules

Postby Nisarg Shah 1C » Sat Nov 11, 2017 2:06 pm

Polar bonds occur when the charge distribution between two atoms is unequal. For example, if two atoms do not share electrons equally, it is possible their bonds are polar. A polar molecule is one where the charge distribution is also asymmetric, so there are partial charges on the molecule.

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Re: Polar Bonds vs. Polar Molecules

Postby 605011646 » Sat Nov 11, 2017 2:23 pm

How does polarity play a role in the bonding and interaction of molecules?

Nhan Nguyen 2F
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Re: Polar Bonds vs. Polar Molecules

Postby Nhan Nguyen 2F » Sat Nov 11, 2017 3:12 pm

Ionic bonds form when the difference in electronegativity is large between the molecules. However, sometimes the electronegativity difference in molecules is not large enough to form ionic bonds. The electrons are not shared equally, creating partially negative and partially positive regions. These polar molecules have slightly opposite charges on opposite ends, creating a dipole moment.

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Re: Polar Bonds vs. Polar Molecules

Postby YashDeshmukh1D » Sat Nov 11, 2017 3:49 pm

Can a molecule have all polar bonds but still not be a polar molecule due to the symmetry of its structure?

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Re: Polar Bonds vs. Polar Molecules  [ENDORSED]

Postby Chem_Mod » Sat Nov 11, 2017 4:48 pm

Yes, this is possible. For example, carbon tetrafluoride would have four very polarized bonds, but due to the symmetry about the molecule, there would be very little polarity. This also explains why perfluorocarbons, which are like hydrocarbons but containing only C-F bonds, are very nonpolar despite having very polarized bonds.

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