Question

Put the letter of the correct answer for each of the following questions in the box to the right.:

A large partition coefficient for the extraction of naphthalene into ethyl acetate from water means that naphthalene will be found: (A) only in the water layer (B) only in the ethyl acetate layer (C) mostly in the water layer (D) mostly in the ethyl acetate layer

For a mixture of pure solvents diisopropylether and dimethylformamide, diisopropylether will be found as (A) the top layer (B) the bottom layer (C) neither; the two solvents are miscible (D) cannot determine

Answer 1

Ans:- Since partition coefficient is large for napthalene into ethyl acetate from water means that napthalene was found to be.

[D] -> mostly in the ethyl acetate

Explanation:- when a solute is mixed between two immiscible solvent, then concentration ratio of solute in two solvent is constant. It is called partition coefficient.

for this problem Kw = concentration of naphthalene in Ethyl acetate / concentration of napthalene in water

Since Kw is high (given). So, concentration of napthalene is greater in ethyl acetate compare to H₂O.