Chem 114A 2009 lecture 3 AS GIVEN 0113090

Chem 114A 2009 lecture 3 AS GIVEN 0113090 - Chem 114A...

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Chem 114A Aqueous Environment and Intermolecular Forces Lecture 3 January 13, 2009 (Tuesday) 1
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Chemical origin of life. Review 2
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Miller-Urey experiment 3
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Four fundamental biochemical building blocks. 4 Review
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Brief review of chemical thermodynamics. 5 The energy relevant to biochemical systems is Gibbs free energy, G, in units of joules per mole (J mol-1) Review
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6 Review
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Electric dipole of water. Review 7
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Dissociation of water. 8 Review
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The pH scale describes the actual concentration of ions in solution. 9 Review
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Water. 10
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The pKa of an acid is the pH at which it is half- dissociated. The “a” stands for apparent because in biochemistry generally use measured values that depend on some standard conditions. pKa is also the midpoint of a titration curve. 11
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12
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Titration curves. 13
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Henderson-Hasselbalch equation. 14
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Henderson-Hasselbach equation. 15
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Example problem. 16
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17
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18
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19
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Titration. 20
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