0.170g of caffeine is dissolved in 10.0mL of water. The caffeine is extracted from the aqueous...
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0.170g of caffeine is dissolved in 10.0mL of water. The caffeineis extracted from the aqueous solution three times with 5.0-mLportions of methylene chloride. Calculate the total amount ofcaffeine that can be extracted into three portions of methylenechloride. Caffeine has a distribution coefficient of 4.6 betweenmethylene chloride and water.
Please explain throughoutly. This is my first time working withextraction question
0.170g of caffeine is dissolved in 10.0mL of water. The caffeineis extracted from the aqueous solution three times with 5.0-mLportions of methylene chloride. Calculate the total amount ofcaffeine that can be extracted into three portions of methylenechloride. Caffeine has a distribution coefficient of 4.6 betweenmethylene chloride and water.
Please explain throughoutly. This is my first time working withextraction question
Answer & Explanation Solved by verified expert
Weight of caffeine is W = 0.170 gm.
Volume of water is V= 10 ml
Volume of methylene chloride which extracted caffeine is v= 5ml
No of portions n=3
Distribution co-efficient= 4.6
TOTAL AMOUNT OF CAFFEINE THAT CAN BE UNEXTRACTED IS GIVEN BY
                  wn= WX[KDxV/(KDxV+v)]n
                                 w3= 0.170[ (4.6x10)/(4.6X10+5)]3
                           = 0.170[46/46+5]3
                           = 0.170[46/51]3
                         =0.170
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