Question

In the redox reaction 2 S2O32-(aq) + I3-(aq) -> S4O62-(aq) + 3 I-(aq), if 18.75 mL of 0.2500 M Na2S2O3 is needed for complete reaction with 15.00 mL of the I3" solution, what is the molar concentration of I3"?

Answer

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