0. Consider the solubility equilibrium of calcium hydroxide: [ mathrm{Ca}(mathrm{OH})_{2} ext { } quad mathrm{Ca}^{2+}+2 mathrm{OH}^{-} ] And ( Delta_{r} H^{circ}=-17.6 mathrm{~kJ} mathrm{~mol}^{-1} ) and ( Delta_{r} S^{circ}=-158.3 mathrm{~J} mathrm{~K}^{-1} mathrm{~mol}^{-1} ). A saturated calcium hydroxide solution contains ( 1.2 imes 10^{-2} mathrm{M}left[mathrm{Ca}^{2+} ight] ) and ( 2.4 imes 10^{-2}left[mathrm{OH}^{-} ight] )at ( 298 mathrm{~K} ), which are at equilibrium with the solid in the solution. The solution is quickly heated to ( 400 mathrm{~K} ). Calculate the ( Delta_{mathrm{r}} mathrm{G} ) at ( 350 mathrm{~K} ) with the concentrations given, and state whether calcium hydroxide will precipitate or be more soluble upon heating. (10 marks)

0. Consider the solubility equilibrium of calcium hydroxide: Ca(OH)2ECa2++2OH+ And H=17.6kJmol1 and S=158.3JK1mol1. A saturated calcium hydroxide solution contains 1.2102M[Ca2+] and 2.4102[OH]at 298K, which are at equilibrium with the solid in the solution. The solution is quickly heated to 400K. Calculate the rG at 350K with the concentrations given, and state whether calcium hydroxide will precipitate or be more soluble upon heating. (10 marks)