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Chem 152 - Lab 5 - Electrochemistry

Chem 152 - Lab 5 - Electrochemistry - Name:AliceMengJuHsieh...

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Page 1 of 3 Total Points = 60 Notebook = possible deduction of up to 5 points if your notebook pages are not organized and legible. Standard Potentials vs. Silver/Silver Chloride Reference Electrode Cell Numbers Potential, V Potential, V Experimental Literature (page 37) vs. Silver vs. Silver See Help Box below. (Black Lead on Ag/AgCl) (reverse leads) Values Values 1 (Ag) - Reference 0.56 -0.56 0.783 0.80 10 pts 2 (Zn) - Reference -0.67 0.68 -0.453 -0.76 3 (Pb) - Reference -0.36 0.36 -0.144 -0.13 4 (Cu) - Reference 0.12 -0.12 0.342 0.34 Name:  Alice Meng-Ju Hsieh Quiz Section:  AP E o E o EXPERIMENT 5 Electrochemistry Part I:  Standard Potentials Purpose and Method                     The first goal is to measure the standard reduction potentials of Ag/Ag + , Pb/Pb 2+ , Cu/Cu 2+  and Zn/Zn 2+ .  How is this accomplished? ( 5 pts )                   To measure the standard reduction potentials of Ag/Ag+, Pb/Pb2+, Cu/Cu2+ and Zn/Zn2+, we have to assemble several                   electrochemical half cells. The diagram is in the lab manual. We need to use metal electrodes their corresponding metal ion                   solutions. Then we can connect the half cells we make to the reference electrode to determine the half cell potential of our half                   cells. The reference electrode is made by AgCl(s) + e-  --> Ag(s) + Cl-(aq) and it's 0.22V relative to the standard hydrogen                   electrode. The second goal is to construct a cell with E cell  = 0.50V.  How is this accomplished? ( 5 pts )                   To consturct a cell with Ecell = 0.50V we need to first complete part 1. Then, based on the data from part 1, we need to decide 
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