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You want to decaffeinate your coffee by extracting the caffeine outwith dichloromethane. It's too late to...

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Chemistry

You want to decaffeinate your coffee by extracting the caffeineoutwith dichloromethane. It's too late to extract the caffeinefromthe coffee beans because you've already brewed yourself a 200mL cupof coffee. Your particular brand of coffee contains100 mg ofcaffeine in that 200mL cup. The partitioncoefficient of caffeine indichloromethane/water is 9.0. How much caffeine would still be inyour 200 mL if you did: A. One extraction using 200 mLofdichloromethane B. Two extractions using 100 mL ofdichloromethaneach.

Answer & Explanation Solved by verified expert
3.8 Ratings (675 Votes)
partition coefficient of caffeine in dichloromethanewater is 90 Which means that everytime you do the partitioning 9 parts go to dichloromethane and 1 part stays in water when extracting with same volume of solvent A    See Answer
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