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In a caffeine experiment, you extract each portion of the tea solution twice wit

ID: 931258 • Letter: I

Question

In a caffeine experiment, you extract each portion of the tea solution twice with about 35-mL volumes of CH2Cl2. Would each of the following “improvements” result in more caffeine extracted or not? (Assume that you can take care of any emulsions, etc.) a. Use more dichloromethane in each of the two extractions. b. Use one 70-mL portion of CH2Cl2 for the extractions. c. Shake the separatory funnel longer with each extraction. (Assume that shaking longer will not increase the amount of emulsion produced, or any other weird thing!)

Explanation / Answer

a) and b) options there is chance to increase the amount of caffeine from it sample. Because more solvent may dissolve more caffiene. even it is doubled or increasing amount at a time.

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