prbset03b_key4324

# Prbset03b_key4324 - EMA 4324 Problem Set 3b KEY 2-7[Note that I have modified the problem in the textbook A specimen of iron[Fe is placed in an

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EMA 4324 Problem Set 3b KEY 2-7. [Note that I have modified the problem in the textbook.] A specimen of iron [Fe] is placed in an air-saturated NaCl solution of unknown concentration. Solution pH is determined to be 1.0. Connecting the iron electrode to the negative terminal of a high impedance voltmeter, a cell voltage of +0.50 volts is measured against a copper/saturated copper sulfate reference electrode. Considering the chemical composition of the system, what anodic and cathodic reactions are possible? ****************************************************** V = E(ref) - E(Fe +2 /Fe); E(Fe +2 /Fe) = E(ref) - V = 0.318 - 0.50 = -0.182v . This potential is a measured electrode potential which results from the reactions taking place on the surface of the electrode, as distinguished from a reaction potential which is determined by the thermodynamics for a particular process or reaction [free energy stuff]. so.

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## This note was uploaded on 10/18/2011 for the course EMA 4324 taught by Professor Staff during the Fall '09 term at University of Florida.

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Prbset03b_key4324 - EMA 4324 Problem Set 3b KEY 2-7[Note that I have modified the problem in the textbook A specimen of iron[Fe is placed in an

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