CHM LECTURE NOTES CH 12 6 Vapor Pressure of Solutions Described by Raoult s Law Psol Xsolvent Psolvent Distinguish between molecular solutes and ionic solutes For an ionic solute Psolution Xsolvent Psolvent Xsolvent n solvent n solvent n solute Multiply n solute by of dissolved ions Do example 12 6 in book for extra practice Ideal and not ideal solutions An ideal solution follows Raoult s law at all concentrations of solute and solvent the solute solvent interactions are equal to the solute solute and solvent solvent interactions if the solute has h bonds within itself and the solvent h bonds and they for h bonds together they form an ideal solution A non ideal solution the solute solvent interactions are either stronger or weaker than the solute solute and solvent solvent interactions For an ideal solution solute A solvent B PA XAPO PB XBPO B Ptotal of solution PA PB A
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