1372 Lec 15Nov2011a - 1 General Chemistry 4th edition,...

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1 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry
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2 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry
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3 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry
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4 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry
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5 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry
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8 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry In any oxidation–reduction reaction, there are two half- reactions : Oxidation : a species loses electrons to another species. Cu (s) →Cu 2+ (aq) + 2e - Reduction : a species gains electrons from another species. Ag + (aq) + e - → Ag (s) Half-Reactions Oxidation–Reduction: The Transfer of Electrons Chapter 18: Electrochemistry
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9 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry A voltaic cell uses a spontaneous redox reaction to produce electricity. A half-cell consists of an electrode (strip of metal or other conductor) immersed in a solution of ions. A Qualitative Description of Voltaic Cells Both oxidation and reduction occur at the electrode surface, and equilibrium is reached. This Zn 2+ becomes a Zn atom. This Zn atom leaves the surface to become a Zn 2+ ion.
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10 General Chemistry 4 th edition, Hill, Petrucci, McCreary, Perry An electrochemical cell consists of two half-cells with the appropriate connections between electrodes and solutions. Two half-cells may be joined by a salt bridge that permits migration of ions, without completely mixing the solutions. The
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This note was uploaded on 12/19/2011 for the course CHEM 1372 taught by Professor Staff during the Spring '08 term at University of Houston.

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1372 Lec 15Nov2011a - 1 General Chemistry 4th edition,...

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