Solvent Extraction – pH Effects Fraction remaining in phase 1 after 1 extraction, q V,+ DV2 НА K [H°l»«_ K+ [H *]»q D = [HA]2 (acid solute) %3D [HA], +[A 1 pH - more free acid, less A - better extraction into organic solvent

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Solvent Extraction – pH Effects
-
Fraction remaining in phase 1 after
1 extraction, q =
V,+ DV2
HA -
HA
K [H la (acid solute)
K.+[H
[HA]2
D =
[HA], +[A 1,
pH
more free acid, less A
better extraction into organic solvent
Transcribed Image Text:Solvent Extraction – pH Effects - Fraction remaining in phase 1 after 1 extraction, q = V,+ DV2 HA - HA K [H la (acid solute) K.+[H [HA]2 D = [HA], +[A 1, pH more free acid, less A better extraction into organic solvent
A 50 ml aqueous sample containing 0.015 M amine (Ka = 3.16 x 10-9) was adjusted to pH 9.0 and then extracted
24
with 100 mL of chloroform. The CHCI3-H20 partition coefficient of the amine is K=4 favoring chloroform. What
fraction of the amine was extracted by the organic solvent?
A: 86%
B: 12%
C: 95%
D: 5.3%
Transcribed Image Text:A 50 ml aqueous sample containing 0.015 M amine (Ka = 3.16 x 10-9) was adjusted to pH 9.0 and then extracted 24 with 100 mL of chloroform. The CHCI3-H20 partition coefficient of the amine is K=4 favoring chloroform. What fraction of the amine was extracted by the organic solvent? A: 86% B: 12% C: 95% D: 5.3%
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