Suppose the compound has
a distribution coefficient K = 2 between solvent1
and solvent2.
(1) If there are 30 particles of
compound , these are distributed between
equal volumes of solvent1 and solvent2...
(2) If there are 300 particles of
compound , the same distribution ratio
is observed in solvents 1 and 2,
See? No matter how much solute there is, the distribution coefficient K remains constant, equal to 2.
Organic Web Chem University of Alberta