The partition coefficients of Iodine distribution between two immiscible liquids, water and carbon (tetrachloride) is given below:Choose the correct statement about the system:
Correct answer: B. Iodine is extracted from aqueous layer by CCl4
- A. Iodine is extracted from CCl4 layer by water
- B. Iodine is extracted from aqueous layer by CCl4
- C. Iodine is more soluble in water than CCl4
- D. The value of K depends on the amount of Iodine added
Explanation
Iodine vastly prefers to dissolve in CCl4 , thus it migrates from the aqueous (H2O) phase into the non-aqueous (CCl4) phase , thus we say that CCl4 extracts the iodine from the aqueous phase.
This question appeared on the ETEA MDCAT 2014 paper, which you can sit online with every answer explained.
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About Solvent Extraction
Solvent extraction separates a substance by distributing it between two immiscible liquids according to its solubility and partition coefficient. The topic covers selecting suitable solvents, use of a separating funnel, acid-base extraction, phase identification, drying and evaporation, and why several small extractions usually recover more solute than one large extraction.
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