Class Notes Mar 01

Class Notes Mar 01 - 3/1/2010 Announcements: Monday, March...

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3/1/2010 1 Announcements: Monday, March 1, 2010 Homework WebAssign #8- Due Wednesday, March 3 at 8:00 AM Recitation Week 8 – Redox of Halogens Lab- Spontaneity of Oxidation-Reduction Reactions Bring GLOVES!! Complete your prelab before recitation. Report due at the end of lab! Suggested Textbook Questions Continue Chapter 21 problems and reading. Silberberg Table 21.2: Selected Standard Electrode Potentials (298 K) Get reduced! Get oxidized! SHE = More in Eº’s in Appendix D! Given the following half reactions, what is the best reducing agent? Cu 2+ + 2e - → Cu(s) E° = +0.34 V Pb 2+ + 2e - → Pb(s) E° = -0.13V March 1, 2010 - CT#1 A. Cu 2+ (aq) B. Cu(s) C. Pb 2+ (aq) D. Pb(s) A reducing agent gets oxidized. Only Cu(s) and Pb(s) can get oxidized. Pb 2+ has a lower std reduction potential so Pb(s) is more likely to be oxidized. Standard Reduction Potentials Cu 2+ + 2e Cu E = +0.34 V Zn 2+ + 2e Zn E = 0.76 V Electrons are flowing in opposite direction when paired with SHE: cathode to anode!
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This note was uploaded on 03/23/2010 for the course CHEM 1131 taught by Professor Redin,kend during the Spring '08 term at Colorado.

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Class Notes Mar 01 - 3/1/2010 Announcements: Monday, March...

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