BIO 111-14 Chapter 3 Notes
BIO 111-14 Chapter 3 Notes BIOL 111 102
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This page Class Notes was uploaded by Melissa Romano on Wednesday February 17, 2016. The Class Notes belongs to BIOL 111 102 at Camden County College taught by Jill Carroll in Winter 2016. Since its upload, it has received 23 views. For similar materials see Introduction to Modern Biology in Science at Camden County College.
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Date Created: 02/17/16
Chapter 3 Water and Life Cohesion water39s attraction to water molecules Surface Tension Adhesion water39s attraction to another molecule Ex meniscus in test tube with water Heat of Vaporization When water goes from liquid to gas Evaporative Cooling Excess moisture in air humidity causes more sweating Ex Dogs panting Ice is less dense than water Liquid molecules more abundant and less organized Solid molecules less abundant and equally spaced Water is a very powerful solvent Solution Aqueous Solutions Solutions containing water Solvent most abundant molecule H20 Solute less abundant molecule dissolved in water Hydration Shells Molecule surrounded by water Takes overdissolves smaller molecules Hydrophili water lovingattracting molecule Hvdronhobic water fearing molecules Water Ionizes H20 molecules transfer Hydrogen molecules AcidszBases pH ogH Acid increases Hydrogen Ion Concentration Base Decreases Hydrogen Ion Concentration pH Scale Acidic H gt OH39 0 Neutral H OH39 7 Basic Alkaline H lt OH39 14 07 Acids donate H in aqueous solution 714 Bases donate OH39 or accept H in aqueous solution 1 pH 10x more concentration 1 pH 10x less concentration Buffers Substances that minimize uctuations in pH of solutions 0 Most buffers consist of an acidbase pair that reversibly combines with H Ex blood H2CO3 Carbonic Acid lt gt H HCO339 Bicarbonate