The amount of I3−​(aq) in a solution can be determined by titration with a solution containing a known concentration of S2​O32−​( aq ) (thiosulfate ion). The determination is based on the net ionic equation 2 S2​O32−​(aq)+I3−​(aq)⟶S4​O62−​(aq)+3I−(aq) Given that it requires 35.5 mL of 0.360MNa2​ S2​O3​ (aq) to titrate a 20.0 mL sample of I3−​(aq), calculate the molarity of I3−​(aq) in the solution. [I3−​]= M