Determine the concentration of unknown silver nitrate solution

For the following problem, we’ll consider the reaction

NaCl(aq) + AgNO3(aq) => NaNO3(aq) + AgCl(s)

Note that all of the aqueous species in the above reaction exists as ions in solution:

NaCl(aq) exists as Na+ and Cl- AgNO3 exists as Ag+ and NO3-
NaNO3 exists as Na+ and NO3- and AgCl(s) is a white solid.

The solution labeled "Solution 3" in the virtual lab stockroom contains an unknown amount of AgNO3. Design and perform an experiment to determine the mass of AgNO3 that was present in the "Solution 3" solution.