{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

23_Extraction-page4 - It is not always possible to...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
It is not always possible to quantitatively remove the solute using a single extraction. Your options typically are to: Increase the volume of the extracting solvent - not usually a good idea. Use multiple extractions. Total amounts extracted are the sum of all extractions so: (p + pq + pq 2 ... + pq n-1 )C 0 V 2 = (1-q n )C 0 V 2 or 1 - q n = E , %E = 100 (1-q n ) In our earlier example, 75% of a solute was removed with one extraction. We can determine how much would be removed from 10 sequential extractions. n = 10 q = 0.25 E = 1 - 0.25 10 = 1 - 9.6 x 10 -7 %E = 99.9999% ~ A precursor to chromatography.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}