Chapter 5.6, Problem 90P

When solid quartz “dissolves” in water, it combines with water molecules in the reaction ${\text{SiO}}_{\text{2}}\left(\text{s}\right)+{\text{2H}}_{\text{2}}\text{O}\left(\text{l}\right)\leftrightarrow {\text{H}}_{\text{4}}{\text{SiO}}_{\text{4}}\left(\text{aq}\right)$.

(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.