Lecture 5

Lecture 5 - Lecture 5 Guide Lecture 5 September 8 Readings 55-67 Water Molecules and pH(HOME The pH Scale(CONTINUED FROM LECTURE 4 Buffers donate

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Lecture 5 Guide (HOME) Lecture 5 September 8 Readings:  55-67  Water Molecules and pH     The pH Scale (CONTINUED FROM LECTURE 4) Buffers  – donate and accept H +  from solution, maintain stable pH.  Carbonic acid – biological buffer    Importance Of pH Regulation a. Metabolic reactions have pH optima  b. Molecular structure can change with pH  c. Toxicity of molecules can depend on pH  Acid Rain  (from sulfur oxides and nitrogen oxides)  Precipitation with a pH lower (more acidic) than 5.6    Largely derived from burning fossil fuels (coal, oil and gas)  Carbon Compounds Important biological Building Blocks        Formation of Bonds with Carbon 
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1. Valence of Carbon is four; forms four covalent bounds  2. Covalent bonds form a tetrahedron shape with Carbon 3. Carbon can form single or double bonds with other atoms    Important Valences for Carbon-Based Molecules  (Fig. 4.4) Hydrogen = 1 Oxygen = 2 Nitrogen = 3 Carbon = 4
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This note was uploaded on 10/23/2008 for the course BIOL 1201 taught by Professor Wishtichusen during the Fall '07 term at LSU.

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Lecture 5 - Lecture 5 Guide Lecture 5 September 8 Readings 55-67 Water Molecules and pH(HOME The pH Scale(CONTINUED FROM LECTURE 4 Buffers donate

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