1.18 BiSci 001 - BiSci 001 Monday, January 18, 1999...

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BiSci 001 Monday, January 18, 1999 Announcements: There will be a review session tonight in 110 Wartick Lab. Lecture notes: Acids, Bases, pH and Buffers Acids are substances that release hydrogen ions (H + ) in solution. Example: HCL becomes H + and CL - Bases are substances that combine with H + in solution or release OH - . Buffers combine with or release hydrogen ions in response to changes in pH. pH is the measure of the hydrogen ion (H + ) concentration of a solution. * Human body pH level is 7.4
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Water: The Solvent of Life 1. 100 o c liquid range. 2. Frozen state floats. (less dense) 3. High heat capacity. 4. High heat of vaporization. 5. High heat of fusion. 6. High surface tension. 7. Highly polar Points to Ponder How would visitors from outer space describe life on earth? * "Carbon based units" * "ugly bags of mostly water" If we are 75%-85% water, why aren't we "mushy" like a water balloon?
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* All of the water in our bodies is contained 93% of the ELEMENTS in our bodies are C arbon, H
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This note was uploaded on 02/21/2008 for the course BI SC 001 taught by Professor Schlegel during the Spring '99 term at Pennsylvania State University, University Park.

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1.18 BiSci 001 - BiSci 001 Monday, January 18, 1999...

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