Description

Used for non-electrolyte concentrated solutions.

For ideal liquid mixtures of unassociated components A and B, Vignes recommended the following relationship:

Where $D_{AB}$ is the diffusion coefficient of A in B at infinite dilution, $D_{BA}$ is the diffusion coefficient of B in A at infinite dilution, and $X_A$ and $X_B$ the mole fractions of components A and B, respectively.