Question

Iodine, I2, reacts with aqueous thiosulfate ion in neutral solution according to the balanced equation I2(aq)+2S2O2āˆ’3(aq)ā†’S4O2āˆ’6(aq)+2Iāˆ’(aq).

How many grams of I2 are present in a solution if 33.00 mL of 0.165 M Na2S2O3 solution is needed to titrate the I2solution?
I would look at that equation if I were you. Isn't that S2O3^2- and S4O6^2-?

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