At equimolar concentrations of and

CHEMISTRY · Single correct · AP · Chemistry · Thermodynamics and Electrochemistry · Thermodynamics and Electrochemistry

Problem

At equimolar concentrations of

\text{Fe}^{2+}

and

\text{Fe}^{3+}

, what must

[\text{Ag}^+]

be so that the voltage of the galvanic cell made from the

(\text{Ag}^+ | \text{Ag})

and

(\text{Fe}^{3+} | \text{Fe}^{2+})

electrodes equal to zero?

\text{Fe}^{2+} + \text{Ag}^+ \rightleftharpoons \text{Fe}^{3+} + \text{Ag}

E^0_{\text{Ag}^+|\text{Ag}} = 0.7991

;

E^0_{\text{Fe}^{3+}|\text{Fe}^{2+}} = 0.771

(a)

0.33\text{ M}

(b)

0.44\text{ M}

(c)

0.47\text{ M}

(d)

0.61\text{ M}