Chap_14 - Chemistry52 Chapter14 TYPESOFSOLUTIONS A...

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Chemistry 52 Chapter 14 1 TYPES OF SOLUTIONS A solution is a homogeneous mixture of two substances: a solute and a solvent . Solute : substance being dissolved; present in lesser amount. Solvent : substance doing the dissolving; present in larger amount. Solutes and solvents may be of any form of matter: solid, liquid or gas . Some Examples of Solutions Type Example Solute Solvent Gas in gas Air Oxygen (gas) Nitrogen (gas) Gas in liquid Soda water CO 2 (gas) Water (liquid) Liquid in liquid Vinegar Acetic acid (liquid) Water (liquid) Solid in liquid Seawater Salt (solid) Water (liquid) Liquid in solid Dental amalgam Mercury (liquid) Silver (solid) Solid in solid Brass Zinc (solid) Copper (solid) Solutions form between solute and solvent molecules because of similarities between them. ( Like dissolves Like ) Ionic solids dissolve in water because the charged ions ( polar ) are attracted to the polar water molecules. Non­polar molecules such as oil and grease dissolve in non­polar solvents such as kerosene.
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Chemistry 52 Chapter 14 2 CONCENTRATION UNITS The concentration of a solution is the amount of solute dissolved in a given amount of solvent. amount of solute Concentration = amount of solution Several quantitative expressions of concentration are used in chemistry. MASS PERCENT Mass percent (or weight percent) of a solution is the mass of solute divided by the mass of solution .
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Chap_14 - Chemistry52 Chapter14 TYPESOFSOLUTIONS A...

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