Solved: Although other solvents are available, dichloromethane (CH2Cl2) is still often
Chapter 13, Problem 13.141(choose chapter or problem)
Although other solvents are available, dichloromethane (CH2Cl2) is still often used to decaffeinate drinks because the solubility of caffeine in CH2Cl2 is 8.35 times that in water. (a) A100.0-mL sample of cola containing 10.0 mg of caffeine is extracted with 60.0 mL of CH2Cl2. What mass of caffeine remains in the aqueous phase? (b) A second identical cola sample is extracted with two successive 30.0-mL portions of CH2Cl2. What mass of caffeine remains in the aqueous phase after each extraction? (c) Which approach extracts more caffeine?
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