Chemistry 28 Monday, November 6, 2006

Chemistry 28 Monday, November 6, 2006 - Monday, November...

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Monday, November 06, 2006 Chemistry LIVE UP TO YOUR POTENTIAL How does energy affect redox? What governs spontaneity in redox? Text: sections 11.1, 11.3-11.4 1. 2. We need to know E of highest filled/lowest unfilled orbitals a. “Simplified” orbital diagram 3. Requirements for a “good” reducing agent a. Filed orbital at high E i. Higher E, better agent 4. Requirements fro a “good” oxidizing agent a. Empty orbital at low E i. Lower E, better agent 5. A measure of relative orbital E: a. Reduction potentials 6. a. Also contribute to spontaneity Reduction potentials take these into account! REDUCTION POTENTIALS 1. Voltage of one half reaction relative to another can be measured 2. “Electrochemical cell” a. Half reactions: separated in space i. Connected by wire ii. Connected by salt bridge 3. e- move from one half cell a. through the wire b. to the other half cell 4. e- flow spontaneously a. Galvanic Cell Oxidation takes place at the anode
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Chemistry 28 Monday, November 6, 2006 - Monday, November...

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