Lacey_Che131_F2011_Lect-32p

Lacey_Che131_F2011_Lect-32p - Lec-32: Ion-Ion Interactions...

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Lec-32: Ion-Ion Interactions Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 1 Intermolecular Forces H 2 O ` Ion-ion interactions ` Ion-dipole interactions ` Dipole-dipole interactions Hydrogen bonds Ń ` Dispersion forces (London forces) ` Dipole-induced dipole interactions Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 2 Strong interaction = more energy required
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Ion-Ion Interactions Coulomb’s Law charges of the two ions E v (Q 1 Q 2 ) E d Separation distance Provides intuition for relative energies of interaction Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 3 Ion-Ion Interactions Coulomb’s Law charges of the two ions E v (Q 1 Q 2 ) E d Separation distance Provides intuition for relative energies of interaction Roy A. Lacey, Stony Brook University; Che 131, Fall 2011 4 2-1
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Predicting Interaction Strength (Q 1 Q 2 ) Coulomb’s Law E v d An increases in the charges of ions will ` An increases in the charges of ions will cause an increase in the force of attraction between a cation and an anion.
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Lacey_Che131_F2011_Lect-32p - Lec-32: Ion-Ion Interactions...

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