What is the molarity of a potassium triiodide solution, KI3(aq), if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0.500 M thiosulfate solution, K2S2O3(aq)?
The chemical equation for the reaction is 2 S2O3^2-(aq) + I3^-1(aq) ---> S4O6^2-(aq) + 3 I^-1(aq).