Partition Coefficient

$K=\frac{[A{]}_{\text{solvent 1}}}{[A{]}_{\text{solvent 2}}}$

• $K$ is an equilibrium constant for a particular compound $A$ and solvents 1 and 2
• The concentration is often in $\frac{\mathrm{g}}{\mathrm{L}}$ or $\frac{\mathrm{g}}{\mathrm{mL}}$
• Usually organic over aqueous