Question

A sample containing approximately 1gram of an organic solute dissolve in 100ml of water the aqueous solution is then shaken with 100ml of ether analysis of ether show that 0.7g of y is extracted

1. What is the distribution coefficient of this system

2 what fraction of y will have been extracted by 425ml portion of the ether

Answer 1

KD_e/w = C_ether/C_water = ((0.7 g)/(100 ml))/((1-0.7 g)/(100 ml)) = 2.3333

2.3333 = ((x g)/(425 ml))/((1-x g)/(100 ml))

x = 0.908 g

fraction = (0.908 g)/(1 g)*100% = 90.8%