Chapter 3 Notes

Chapter 3 Notes - Chapter three notes Biological chemistry...

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Partialy negative H O Partially positive H 10 -7 M 10 -14 M pH = 7 pH = 14 10 -7 10 0 Neutral Base When H + is removed H + + HCO 3 when H + is added bicarbonate ion Chapter three notes Biological chemistry is what chemistry - Cells are 80% water Water covers ¾ of the earth's surface Properties of water 1. Present in nature and all three states 2. Unusual properties of water due to its polarity a. Cohesion - water molecules hydrogen bond with each other (figure 3.3) b. Adhesions - water molecules hydrogen bomb to each other (Polar molecules). This is what creates wetness. c. High surface tension - considerable force required to break surface (figure 3.4) d. High specific heat - one Cal/Gram/degrees Celsius He must break hydrogen bonds before water molecules can gain kinetic energy making the water temperature rise e. High heat of vaporization - 540 calories/gram to vaporize 100° C water f. Ice floats on cold liquid water (figure 3.5) g. Good solvent for polar and ionic compounds In an aqueous solution, solvent equals water, solute equals dissolved substance
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Chapter 3 Notes - Chapter three notes Biological chemistry...

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