Ch. 15 - Solutions I. How Solutions Form  Definitions  Types of Solutions  Dissolving  Rate of Dissolving.

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Presentation transcript:

Ch Solutions I. How Solutions Form  Definitions  Types of Solutions  Dissolving  Rate of Dissolving

A. Definitions  Solution -  Solution - homogeneous mixture Solvent Solvent - present in greater amount Solute Solute - substance being dissolved

A. Definitions Solute Solute - KMnO 4 Solvent Solvent - H 2 O

B. Types of Solutions  Based on state of solvent.  All solid-liquid-gas combos are possible.  EX: dental amalgam (alloy of silver, mercury, etc.) liquid solute, solid solvent solid solution

C. Dissolving  Solvation occurs at the surface of the solute solvent particles surround solute particles (+/- attraction) solute particles are pulled into solution

C. Dissolving NaCl dissolving in water

D. Rate of Solution  Solids dissolve faster... more stirring small particle size (increased surface area) high temperature

D. Rate of Solution  Gases dissolve faster... no shaking or stirring high pressure low temperature