Chapter 18, Problem 11E

A 25.00mL sample of a clear saturated solution of ${\text{Pbl}}_2$ requires 13.3mL of a certain ${\text{AgNO}}_{\text{2}}\left(\text{aq}\right)$ for its titration. What is the molarity of this ${\text{AgNO}}_{\text{2}}\left(\text{aq}\right)$ ?
   ${\text{I}}^{-}\left(\text{satd}{\text{PbI}}_{\text{2}}\right)+{\text{Ag}}^{\text{+}}\left(\text{from}{\text{AgNO}}_{\text{3}}\right)\to \text{AgI}\left(\text{s}\right)$