Parameter Value 1. Benzoic acid sample weight, g 0.1702 2. Water volume used, mL 10.0 3. Methylene chloride volume used, mL 5.0 4. Number of extractions 3 5. Erlenmeyer flask weight, g 93.6201 6. Erlenmeyer flask + recovered sample weight, g 93.7841

Parameter Value 1. Benzoic acid sample weight, g 0.1702 2. Water volume used, mL 10.0 3. Methylene chloride volume used, mL 5.0 4. Number of extractions 3 5. Erlenmeyer flask weight, g 93.6201 6. Erlenmeyer flask + recovered sample weight, g 93.7841

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter14: Chromatography

Section: Chapter Questions

Problem 9P

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Question

100%

From the following data (given table in picture 1), solve using this equation (picture 2)

Parameter
Value
1. Benzoic acid sample weight, g
0.1702
2. Water volume used, mL
10.0
3. Methylene chloride volume used, mL
5.0
4. Number of extractions
3
5. Erlenmeyer flask weight, g
93.6201
6. Erlenmeyer flask + recovered sample weight, g
93.7841

Notes: k= (solubility in H2O/solubility in DCM)= 6.0 (at 25°C)
V2
V2 +V,k)
(Final mass of solute)H20
(Initial mass of solute)H,0
Where: V= volume of organic solvent used per extraction
V2= original volume of water
n= number of extractions
k= distribution coefficient

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