Chapter%2012-2

Chapter%2012-2 - Intermolecular Forces 12.3 12.3...

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Unformatted text preview: Intermolecular Forces 12.3 12.3 Intermolecular forces Youve seen chemical bonds: Covalent Ionic Relatively strong bonds Intermolecular forces Much weaker than chemical bonds An attraction between molecules H H Cl Cl Covalent bond Intermolecular Force 12.3 Intermolecular Forces Several Types of Intermolecular Forces From Strongest to Weakest: 1. Ion-dipole 2. H bond 3. Dipole-Dipole 4. Ion-induced dipole 5. Dipole-induced dipole 6. London Dispersion Forces Dipole-Dipole Two polar molecules interacting Review polarity: Need polar bonds Polar bonds come from a difference in Electronegativity The polar bonds cannot cancel each other out Determine polarity of: CH4 NH3 CH 3 CH3 C O Ion-Dipole Only happens in solution You need two things: Ions in solution From a dissolved ionic salt, such as NaCl makes Na+ or Cl- A solution that is made of polar molecules Dipole relates to polar molecule Water is a classic example What is another polar molecule that could be a Hydrogen Bond...
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Chapter%2012-2 - Intermolecular Forces 12.3 12.3...

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