Two galvanic cells, X and Y

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

Problem

Two galvanic cells, X and Y, use the same overall reaction

\mathrm{Cu^{2+}(aq)+Zn(s)\rightarrow Cu(s)+Zn^{2+}(aq)}

with

E^{\circ}=1.10\,\text{V}

. Cell X:

[\mathrm{Zn^{2+}}]=0.10\,\text{M}

and

[\mathrm{Cu^{2+}}]=0.10\,\text{M}

Cell Y:

[\mathrm{Zn^{2+}}]=0.0010\,\text{M}

and

[\mathrm{Cu^{2+}}]=1.0\,\text{M}

298\,\text{K}

, which set most closely approximates the instantaneous potentials of cells X and Y, respectively? (a)

E_X\approx1.10\,\text{V},\;E_Y\approx1.02\,\text{V}

(b)

E_X\approx1.10\,\text{V},\;E_Y\approx1.18\,\text{V}

(c)

E_X\approx1.10\,\text{V},\;E_Y\approx1.28\,\text{V}

(d)

E_X\approx1.18\,\text{V},\;E_Y\approx1.10\,\text{V}