[mark-sev]

In the definition of both of these coefficients activities are used, so are they both concentration dependant? since activity=activ.coeff.*conc. and the act. coeff. varies with concentration... I know that for the partitioning (distribution) coefficient, the activity coefficient can be assumed to be 1 for concentrations till 0,1M and the expression is then K=C(I2 org)/C( I2 water) for example. But what about for the coefficient of equilibrium or there any limitations in concentration?
In which concentration interval are this constants really "constant"?

Thank you for the answers!

Mark

[bokwandu]

the equilibrium constant, should be constant -_-; as it is described