MATHEMATICAL PROBLEMS Problem:1. (P.C. Rakshit) Problem:2. (P.C. Rakshit) Problem:3. (P.C. Rakshit)
MATHEMATICAL PROBLEMS Problem 4 (P.C. Rakshit) The partition coefficient of an alkaloid between chloroform and water is 20, the alkaloid being more soluble in chloroform. Compare the weights of the alkaloid remaining in the aqueous solution of 100 cc solution containing 1 g alkaloid has been shaken (a) with 100 cc chloroform, (b) with successive quantities of 50 cc chloroform. [Ans. (a)0.0476g; (b)0.0083g. ] Problem 5 (P.C. Rakshit) An organic compound is extracted from aqueous solution with successive quantities of 25 cc chloroform. The original volume of the solution is 500 cc and distribution coefficient of the compound is 20 between chloroform and water. Calculate the number of extraction needed for at least 95% recovery of the compound. [Ans. 5 successive extraction]