The distribution coefficient was found to be 1.61.
First we calculate solubility of caffeine, when dissolved in methylene chloride,
Solubility (in g/ml) = mass of caffeine/volume of solvent
Solubility = 1/28
Now, solubility of caffiene when dissolved in water,
Solubility (in g/mol) = 1/46
Now, we calculate distribution coefficient, (kd) by taking the ratio of the solublities i.e..
Distribution coefficient,(Kd) = solubility of caffeine, when dissolved in methylene chloride / solubility of caffeine when dissolved in water.
Kd= (1/28) / (1/46)
Kd= 1.61
Thus, distribution coefficient was calculated and found to be 1.61.
The distribution coefficient of the solute is defined as the ratio of the concentration of solute dissolved in organic solvent to the concentration of solute dissolved in aqueous phase.
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