Post a New Question

chemistry

posted by .

an aqueous solution contains 2 solutes A&B.A is soluble in hexane,B is not.Hexane is liquid at rom temperature
and does not mix with water.The density
of hexane at room temperature is 0.7g/dm3.Describe giving full practical details how you would produce a pue sample of solute A.

  • chemistry -

    I wonder what the vapor pressure of A and B is in solid form.

    If the vapor pressure is low, then one way is to freeze dry the aqueous solution under vacumn, to produce a mass of crystals of A and B. Then, mix that with hexane, to dissolve A, filter to remove B. Then freeze dry under vacumn the solution, and A is left.

    Another way to separate some of the A is to pour hexane into the aqueous solution, shake like the dickens, then let the system settle, when separated, draw off the hexane, and evaporate leaving only A crystals.

    But being a Rube Goldberg kind of guy, I like freeze drying.

  • chemistry -

    Bob Pursley's Rube Goldberg deal sounds good. I like Rube Goldberg separations, too, however, I think a simple extraction procedure would work just as well. A dissolves in hexane, B is not soluble in hexane. Voila! A dissolves in hexane and two or three separate extractions would get most of A, then evaporate the hexane.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

More Related Questions

Post a New Question