A galvanic cell employs a silver electrode in 25.0 mL of 0.150 M AgNO solution as the…

CHEMISTRY · Multi-part · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

A galvanic cell employs a silver electrode in 25.0 mL of 0.150 M AgNO3_3 solution as the cathode compartment and an iron electrode in 100.0 mL of a mixed 0.0200 M Fe2+^{2+}/0.800 M Fe3+^{3+} solution as the anode compartment. The cell is operated at 298 K. Standard reduction potentials (25 °C): Ag+^{+} + e−^- → Ag(s) Eo=+0.80 VE^{\rm o}=+0.80\,{\rm V} Fe3+^{3+} + e−^- → Fe2+^{2+} Eo=+0.77 VE^{\rm o}=+0.77\,{\rm V} (a) Write the balanced overall cell reaction, including the physical states of all species. (b) State the number of electrons transferred in the overall reaction. (c) Calculate the cell potential at 298 K for the given concentrations. Report the answer to the appropriate number of significant figures and include the correct unit.

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