Problem Set 1 - CHM 614/714 Problem Set #1 1. Explain what...

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1 CHM 614/714 Problem Set #1 1. Explain what happened in (a), (b), and (c) in the following Figure. 2. In countercurrent distribution, D A = 30, D B = 15, V u.p. = V l.p. (a) What are the p and q for solutes A and B? (b) If we want to ensure the maximums are 10 tubes apart, how many steps of movement (n) should we have? (c) Calculate the location of maximum concentration of solutes A and B. 3. If D = 3.5 (between a organic solvent and water), V r = 1, how many extractions are necessary to leave less than 1% of the solute in aqueous phase? 4. Under what conditions, K = D? 5. If k' i = 100, k' j = 35, is the separation between i and j favored by thermodynamics? 6. Suppose that K = 3.0 and K a = 1.0 x 10 -5 . If 50 mL of 0.010 M aqueous weak acid is extracted with 100 mL of organic solvent, what will be the formal concentration remaining in the aqueous phase at (a) pH 3.0 and (b) 10.0. 7. Plot the curve of pH vs. log D using the data in question 6. 8.
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This note was uploaded on 10/20/2011 for the course CHEM 653 taught by Professor Wei, robert during the Spring '11 term at Cleveland State.

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Problem Set 1 - CHM 614/714 Problem Set #1 1. Explain what...

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