Ch_322a_2.013

Ch_322a_2.013 - Solubilities The solubility of a solute in a solvent depends on intermolecular forces in the solute solvent and solution The

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Unformatted text preview: Solubilities The solubility of a solute in a solvent depends on intermolecular forces in the solute, solvent and solution. The solubility increases as the solute- solvent interactions increase in strength relative to the solute-solute and solvent-solvent interactions. solute + solvent solute in solvent (solution) Ionic Solids There are very strong interionic attractive forces in ionic solids (lattice energy). Ionic solids dissolve in water and a few other highly polar solvents where strong solute-solvent interactions compensate for the lost solute-solute and solvent-solvent (hydrogen bonding) interactions . Na + Cl- solid solute strong interionic forces + H 2 O solvent strong intermolecular forces Na + aq + Cl- aq solution strong solute-solvent interactions Ionic solids do not dissolve in nonpolar solvents where the solute-solvent interactions are weak. Sodium Chloride in Water NaCl solid ionic lattice structure strong interionic forces potential energy NaCl solid +---- + + + +-- + +--...
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This note was uploaded on 07/22/2009 for the course CHEM 322AL taught by Professor Jung during the Summer '07 term at USC.

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Ch_322a_2.013 - Solubilities The solubility of a solute in a solvent depends on intermolecular forces in the solute solvent and solution The

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