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https://www.khanacademy.org/science/hs-chemistry/x2613d8165d88df5e:stat…
Molecular polarity is determined not just by individual polar bonds, but by the molecule’s 3D shape. Even if bonds are polar, the overall molecule may be nonpolar if the shape cancels out the dipoles. Whether a molecule is polar or not influences properties like solubility, boiling points, and intermolecular interactions.
Sections:
00:00 - Introduction
00:17 - Covalent bonds, electronegativity & polar bonds
01:55 - Why is carbon dioxide nonpolar?
03:52 - Polar bonds don't necessarily mean polar molecules!
04:34 - Why is water polar?
06:33 - ESP maps & symmetry
07:30 - Worked examples: CCl4 & CH3Cl
11:16 - Molecular polarity in larger molecules
13:07 - Intermolecular vs Intramolecular forces
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