Lecture_Notes_102109b

Lecture_Notes_102109b - its ε o cell : { Fe 3+ (aq) Æ Fe...

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Cell Potential y Cell Potential – the driving force for the galvanic cell y Electromotive Force – another way of saying cell potential y Volt – (V) units of cell potential
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Cell Potential y Standard Hydrogen Electrode – has a potential of 0.00 V, what we measure all of the other potentials against
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Cell Potential y Standard Reduction Potential – ( ε o ) all solutes are at 1.00 M, and all gases are at 1.00 atm. The value does not change if the half-reaction is multiplied by an integer.
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Cell Potential
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Cell Potential y To determine the potential for a cell we take the ε o for the anode and subtract it from the ε o for the cathode. The cell runs spontaneously in the direction where the cell potential is positive.
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Cell Potential y Draw a galvanic cell based on the following two half-reactions and give
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Unformatted text preview: its ε o cell : { Fe 3+ (aq) Æ Fe 2+ (aq) { Cr 2 O 7 2-(aq) Æ Cr 3+ (aq) What is ε o cell for the redox reaction: Al (s) + Cu 2+ (aq) → Al 3+ (aq) + Cu (s) 2 . V-2 30 V 4 34 V-1 .3 2 V 70% 16% 4% 10% 1. 2.00 V 2.-2.30 V 3. 4.34 V 4.-1.32 V Al 3+ (aq) + 3 e-→ Al (s) ε o = -1.66 V Cu 2+ (aq) + 2 e-→ Cu (s) ε o = 0.34 V Electrochemistry and Thermodynamics y Faraday – (F) the charge of 1 mole of electrons, 96,485 C/mol. Electrochemistry and Thermodynamics y Determine E o cell and Δ G o for the following reaction: { Al (s) + 3 Ag + (aq) Æ Al 3+ (aq) + 3 Ag (s) Nernst Equation y The relationship between free energy and cell potential at non-standard conditions....
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This note was uploaded on 01/06/2011 for the course CHEM 105BLG at USC.

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Lecture_Notes_102109b - its ε o cell : { Fe 3+ (aq) Æ Fe...

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