intermolecular-forces

intermolecular-forces - Intermolecular forces...

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Unformatted text preview: Intermolecular forces Intermolecular forces and solubility and solubility Why mixtures mix Why mixtures mix • Consider a glass of wine. Why do alcohol, water, & pigment mix together? • There must be attractive forces. Intramolecular forces occur between atoms Intermolecular forces occur between molecules • The factors that determine solubility are the strength of IMFs and speed of molecules. • 4 types of intermolecular forces: ionic, dipole- dipole, hydrogen bonding, and London forces. Electronegativity & IMFs Electronegativity & IMFs 2200 ∆ EN essentially defines the type of IMF. • Ionic bonds form if the ∆ EN is 1.7 or greater. • Dipole-dipole (polar covalent) is around 0.5-1.7. • Hydrogen bonding is a type of dipole-dipole. • London forces exist in all molecules, but are especially important in non-polar covalent molecules (where ∆ EN is less than 0.5). • Recall that ionic are strongest....
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intermolecular-forces - Intermolecular forces...

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