When solid quartz ``dissolves'' in water, it combines with water molecules in the reaction
SiO2(s)+2H2O(l)⟷H4SiO4(aq).
((a)) Use this data in the back of this book to compute the amount of silica dissolved in water in equilibrium with solid quartz, at 25∘C.
((b)) Use the van't Hoff equation (Problem 5.85) to compute the amount of silica dissolved in water in equilibrium with solid quartz at 100∘C.