Explore the concept of molecular polarity in this 14-minute video from Khan Academy. Learn how a molecule's 3D shape, not just individual polar bonds, determines its overall polarity. Discover why carbon dioxide is nonpolar despite having polar bonds, and understand why water is polar. Examine electrostatic potential (ESP) maps and symmetry to predict molecular polarity. Work through examples like CCl4 and CH3Cl, and extend the concept to larger molecules. Differentiate between intermolecular and intramolecular forces, and understand how molecular polarity affects properties such as solubility, boiling points, and intermolecular interactions.
Overview
Syllabus
- Introduction
- Covalent bonds, electronegativity & polar bonds
- Why is carbon dioxide nonpolar?
- Polar bonds don't necessarily mean polar molecules!
- Why is water polar?
- ESP maps & symmetry
- Worked examples: CCl4 & CH3Cl
- Molecular polarity in larger molecules
- Intermolecular vs Intramolecular forces
Taught by
Khan Academy
