27 SpontConcLandscape

27 SpontConcLandscape - What are the reduction potentials...

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CH112 LRSVDS Redox Part 2 1 Standard Hydrogen Electrode What are the reduction potentials based on? CH112 LRSVDS Redox Part 2 2 Half Cell Potentials Measured vs. Standard H 2 electrode (SHE) What is E° 1/2 (ox) ? What is E° 1/2 (red)? cell = E° 1/2 (red) + E° 1/2 (ox) = Zn Electrode
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CH112 LRSVDS Redox Part 2 3 What is E° 1/2 (red) ? What is E° 1/2 (ox)? E 0 cell = E° 1/2 (red) + E° 1/2 (ox) = Is the reaction spontaneous? E 0 cell for Cu/Zn Cell CH112 LRSVDS Redox Part 2 4 What is E ° cell for the following reaction? Al(s) + Cu +2 (aq) ! Al +3 (aq) + Cu(s) CELL POTENTIAL
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CH112 LRSVDS Redox Part 2 5 Oxidizing and Reducing AGENTS Which one of these is the best oxidizing agent ? Br 2 O 2 Fe +2 Na + *****Which is most easily reduced???? Strategy: write out half cell potentials for REDUCTION! Br 2 ( l ) + 2 e - ! 2Br - (aq) 1.06V O 2 ( g ) + 4H + (aq) + 4 e - ! 2H 2 O (l) 1.23V Fe +2 (aq) + 2 e - ! 2Fe (s) -0.44V Na + (aq) + 2 e - ! Na (s) -2.71V Which is the best REDUCING agent? CH112 LRSVDS Redox Part 2 6 Oxidizing and Reducing Agents The more positive E ° red : The more negative E ° red : A species which is
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27 SpontConcLandscape - What are the reduction potentials...

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