Chapter_19IM - Chapter 19 Electrochemistry This chapter...

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Chapter 19 Electrochemistry This chapter uses the concepts developed in thermodynamics to describe the interconversion of chemical energy to electrical energy. Upon completion of this chapter, your students should be able to: 1. Describe the concept of redox reactions using such terms as reduction, oxidation, reducing agents, oxidizing agents and oxidation numbers. 2. Balance redox equations in both acidic and basic solutions. 3. Describe an electrochemical cell using such terms as oxidation, reduction, galvanic cell, electrolytic cell, anode, cathode, half-cell reactions, salt bridge, cell voltage and emf. 4. Use standard cell diagrams to describe an electrochemical cell. 5. Use standard reduction potentials to predict the emf of a cell. 6. Use standard reduction potentials to demonstrate the activity series for metals and the activity series for halogens as described in section 4.4 of this textbook. 7. Define what SHE means and relate its significance to the standard reduction potential table. 8. Predict the outcome of reactions based on standard reduction potentials and E° overall . 9. Define faraday in terms of coulombs and number of electrons. 10. Mathematically relate ∆G°, K and E° cell to each other and to reactions that are spontaneous, at equilibrium, or are non-spontaneous. 11. State the Nernst equation and describe how it is derived. 12. Use the Nernst equation to predict if a reaction is spontaneous, at equilibrium, or non- spontaneous when the concentrations are not at standard conditions. 13. Describe how emf may be generated by concentration cells. 14. Describe dry cell, mercury, lead storage, and solid-state lithium batteries. 15. Explain how measurement of the density of the electrolyte of a lead storage battery is an indication of charge on the battery. 16. Compare fuel cell efficiency to combustion in the generation of electricity.
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17. Describe the hydrogen – oxygen fuel cell to include E° cell and the overall chemical reaction. 18. Describe corrosion and give several examples. 19. Identify several methods used to reduce corrosion including the use of inhibitors, coatings, passivation, and cathodic protection. 20. Predict the expected results from the electrolysis of molten sodium chloride, water, and aqueous sodium chloride. 21. Use the term “overvoltage” to describe the reaction that occurs at the anode for the electrolysis of aqueous sodium chloride. 22. Use the concepts of electrolysis to predict the quantitative results of processes involving
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This note was uploaded on 02/08/2012 for the course CHEM 161 taught by Professor Shaklovich during the Spring '10 term at Harvard.

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Chapter_19IM - Chapter 19 Electrochemistry This chapter...

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