Chapter 3, Problem 71E

Anhydrous ${\text{CuSO}}_{\text{4}}$ can be used to dry liquids in which is insoluble. The ${\text{CuSO}}_{\text{4}}$ is converted to ${\text{CuSO}}_{\text{4}}\cdot {\text{5 H}}_{\text{2}}\text{O,}$ which can be filtered off from the liquid. What is the minimum mass of anhydrous ${\text{CuSO}}_{\text{4}}$ needed to remove $\text{12}{\text{.6 g H}}_{\text{2}}\text{O}$ from a tankful of gasoline?