Equilibrium - Hard

Using the Gibbs energy change,

\Delta G^\circ = +63.3

kJ, for the following reaction, Ag

_2

_3 \rightarrow 2

^+

(aq) + CO

_3^{2-}

(aq), the

K_{sp}

of Ag

_2

_3

(s) in water at 25

^\circ

C is (

R = 8.314

J K

^{-1}

mol

^{-1}

, given

10^{0.91} \cong 8