The distribution of iodine between carbon tetrachloride and water is constant. The value of K is cccia / cH2o = 85. How many ml of carbon tetrachloride would be required to extract 959% iodine from 100 ml of aqueous solution in a single phase?
Suppose we have 1 mmol / L solution of I2 in water. Then 0.959 mmol must be extracted, and 0.041 mmol left in water.
C(iodine in water) = 0.041 / 0.1 = 0.41 mmol / L
85 = , x = = 34.85 (mmol / L)
VCCl4 = 0.959 / 34.85 = 0.0275 L = 27.5 ml
Answer: 27.5 ml.