Question

In a hypothetical experiment, a student performs an extraction by shaking 25.0 mL mineral oil with 50.0 mL of 1.00 M I2 aqueous solution. After allowing the layers to separate the student observes that the mineral oil layer has become purple in color, indicating that some of the I2 has been transferred from the aqueous layer to the mineral oil layer. The student then removes the aqueous layer and titrates it with 5.00 mM Na2S2O3 solution. At the endpoint of the titration, the student measures that 13.2 mL of the Na2S2O3 solution was needed to react completely with the remaining I2. Calculate the distribution coefficient for I2 between mineral oil and water for this experiment. Show all work.

Answer 1

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