20 ml of an aqueous solution of an unknown substance contains 0.600 g of the substance before extraction. 0.360 g after one 10 ml ether extraction, and 0.180 g after two 10 ml ether extractions. Calculate the partition coefficient after both extractions as their avarage.

20 ml of an aqueous solution of an unknown substance contains 0.600 g of the substance before extraction. 0.360 g after one 10 ml ether extraction, and 0.180 g after two 10 ml ether extractions. Calculate the partition coefficient after both extractions as their avarage.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter33: High-performance Liquid Chromatography

Section: Chapter Questions

Problem 33.5QAP

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The mandelic acid is again extracted to 20 ml of ether and after that there is 0,200g of mandelic acid in the water phase. Calculate how much mandelic acid should have stayed in the water phase based on the avarage partition coefficient.

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Probably meant in the calculation that 20*10K+20=0.6, but how did you get that to be 20=6K+12?

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