A. Factors Affecting Solubility

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Presentation transcript:

A. Factors Affecting Solubility Temperature: Pressure: high P: gases more soluble high T: solids more soluble low T: gases more soluble

similar IMAFs dissolve A. Factors Affecting Solubility Polarity: “Like Dissolves Like” similar IMAFs dissolve H H H C C C H C C C C6H14 H H H H2O CCl4

A. Factors Affecting Solubility Polar –Polar Polar –Nonpolar HO–CH2CH2–OH C27H56

Solubility Curves 1) Highest solubility at 20oC? 30oC? 2) How many grams KClO3 at 70oC ? 3) Is 50 g of KCl at 50oC sat, unsat, or supersat? 30 g of NaCl at 30oC?

B. Rate of Dissolving Solids dissolve faster... more surface area (small particle size) 1 gram of sugar solute 1 gram of sugar solute

B. Rate of Dissolving Solids dissolve faster... more surface area (small particle size) more stirring

B. Rate of Dissolving Solids dissolve faster... more surface area (small particle size) more stirring high temp.

B. Rate of Dissolving Gases dissolve faster... no stirring high pressure low temp.

Quick Quiz! 1) Polar water molecules will NOT dissolve… A) polar alcohol molecules B) most ionic compounds C) nonpolar fat molecules D) partially ionized acetic acid molecules

Quick Quiz. 2) For a given substance, which of the following will NOT influence how fast it dissolves? A) temperature B) amount of agitation C) molar mass D) size of the crystals

Quick Quiz. 3) The solubility of a gas in a solvent is affected by? A) both temperature and pressure. B) only pressure C) only temperature D) your face