Describe the molar concentration of i2 in original solution


If 25.00 mL of an aqueous solution of the iodine was titrated with 0.0250 MNa2S2O3(aq), with starch as the indicator. The blue color of the starch-iodine composite disappeared when the 27.65 mL of the thiosulfate solution had been added. The titration reaction is below.

          I2(aq) + 2S2O32-(aq) -> 2 I-(aq) +S4O62-(aq)

Describe the molar concentration of I2 in the original solution?

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Chemistry: Describe the molar concentration of i2 in original solution
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