2CLabManual201303

Part i analysis using the equation eocell eocathode

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Unformatted text preview: M) || Cu(NO3)2(0.10M) | Cu(s), put all the terms together that enter into the equation for Eocell and enter the value you calculate for it. Part I Analysis. Using the equation Eocell = Eocathode - Eoanode, and the reference value of Eo for Cu(II)/Cu(s) for the role that copper plays in this overall cell reaction, determine the value of the standard potential for the half-reaction Fe3+(aq) + e- Fe2+(aq) and enter it here. 19 Part II. 1. Write the chemical reaction in the spontaneous direction for the copper concentration cells--the first cell you examined in Part II of the experiment. Calculate the theoretical value of the potentials for these copper concentration cells using the Nernst equation. Compare the measured and theoretical values for these cell potentials. Your agreement will be only semi-quantitative. 2. Altogether, you have measured the voltages of three cells with different relative concentrations of Fe2+ and Fe3+ ions against a common Cu2+/Cu reference electrode. If you write out the Nernst equation for t...
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