Iodine is sparingly soluble in water but much more so in carbon tetrachloride (CCl4). The...

Iodine is sparingly soluble in water but much more so in carbon tetrachloride (CCl4). The equilibrium constant, also called the partition coefficient, for the distribution of I2 between these two phases

is 83 at 20°C. (a) A student adds 0.030 L of CCl4 to 0.200 L of an aqueous solution containing 0.032 g of I2. The mixture at 20°C is shaken, and the two phases are then allowed to separate. Calculate the fraction of I2 remaining in the aqueous phase, (b) The student now repeats the extraction of I2 with another 0.030 L of CCl4. Calculate the fraction of the I2 from the original solution that remains in the aqueous phase, (c) Compare the result in part (b) with a single extraction using 0.060 L of CCl4. Comment on the difference.