2CLabManual201303

# Q is the reaction quotient for the overall cell

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Unformatted text preview: n potential of the cathode half cell reaction and E°anode is the standard reduction potential of the anode half cell reaction. Q is the reaction quotient, for the overall cell reaction, using the concentrations given in the cell diagram. Note that at equilibrium when Q = K then Ecell is equal to zero. For the cell discussed in the introduction this equation becomes: Ecell = (E°Ag+/Ag - E°Cu++/Cu) - 0.0129 ln[ (0.10M) / (0.10M)2 ] = (0.799-0.337) - 0.0297 = + 0.432 V The numerical values of the standard reduction potentials used in this example were taken from a table in the Appendix of your textbook. In part I you measured the voltages of three cells, each containing a different metal, against a common Cu(II)/Cu reference electrode. The standard reduction potential of the Cu(II)/Cu(s) redox couple is known to be 0.34V. This value is used as the &quot;known&quot; standard reduction potential in the following calculations. For each of the three cells whose voltages you measured in Part I of this experiment write the corresponding redox reaction in the spontaneous direc...
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## This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.

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