Chemistry

Problem

For the galvanic reaction Zn

^{2+}

(aq) + 2 e

^{-}

→ Zn(s), the measured standard cell potential at 298 K is

E^{\circ}=+0.25\,\text{V}

. What is the equilibrium constant

K

for this reaction at 298 K? a)

1.6\times10^{7}

2.8\times10^{8}

3.2\times10^{4}

4.5\times10^{-9}