Lab #9 - 11-15 Last Lab

Lab #9 - 11-15 Last Lab - Elisa Giordano Due: December 6,...

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Elisa Giordano Due: December 6, 2006 Lab #9 Studying Electrochemical Cells and Reduction Potentials INTRODUCTION The purpose of this lab is to help understand reduction potentials for three half-reactions. A galvanic cell was used along with a voltage meter to find the reduction potentials for the reactions. The reduction potentials found were then compared to common values of the potentials found in a text book chart. EXPERIMENTAL PROCEDURES *See Lab Manual* DATA TABLE I. Determining Cell Potentials Using a Zn 2+ | Zn Reference Electrode Determination 1 2 3 Average A. The Zn|Zn 2+ ||Fe 2+ |Fe Cell 0.050 V 0.052 V 0.06 V 0.54 V B. The Zn|Zn 2+ ||Cu 2+ |Cu Cell 0.839 V 0.836 V 0.835 V 0.837 V C. The Zn|Zn 2+ ||Pb 2+ |Pb Cell 0.193 V 0.185 V 0.193 V 0.190 V II. Determining Cell Potentials Without Using a Reference Electrode Determination 1 2 3 Average D. The Fe|Fe 2+ ||Cu 2+ |Cu Cell 0.165 V 0.166 V 0.170 V 0.167 V E. The Fe|Fe 2+ ||Pb 2+ |Pb Cell 0.115 V 0.12 V 0.117 V 0.117 V F. The Pb|Pb 2+ ||Cu 2+ |Cu Cell 0.467 V 0.466 V 0.467 V 0.466 V
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Lab #9 - 11-15 Last Lab - Elisa Giordano Due: December 6,...

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