Lecture Outline 9_1

Lecture Outline 9_1 - Solvent: The dissolving agent of a...

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3. Water, Solutions, pH, and Buffers Reading assignment: Chapter 3, pages 46-–57. Water "Water" Hydrogen bonding between water molecules Cohesion, adhesion, surface tension Solutions; solvent, solute pH: definition Buffers GLOSSARY Adhesion: Clinging of one substance to another substance; e.g. water clings to the sides of a soda straw. Cohesion: The binding together of like molecules, often by hydrogen bonds. Surface tension: A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules. Solution: A homogeneous, liquid mixture of two or more substances.
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Unformatted text preview: Solvent: The dissolving agent of a solution. Water is the most versatile solvent known. Solute: A substance that is dissolved in a solution. Hydrophilic: Having an affinity for water. Hydrophobic: Having an aversion to water; tending to coalesce and form droplets in water. Concentration: Amount of solute per volume of solution. pH: A measure of hydrogen ion concentration equal to neg. log of the H + concentration and ranging in value from 0 to 14. Buffer: A substance that consists of acid and base forms in solution and that minimizes changes in pH when extraneous acids or bases are added to the solution....
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This note was uploaded on 09/18/2009 for the course BIOL 1100 taught by Professor Dr.orr during the Fall '09 term at Kansas.

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Lecture Outline 9_1 - Solvent: The dissolving agent of a...

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