Table : Practical limits for vorticity-induced enantiomeric separation, using a number density, ρ o = 100 mol L -1 , and a molecular pitch, |P|/(2π) = 0.1 Å / rad. Translational diffusion can make it impossible to separate enantiomers unless the vorticity is large enough to overcome diffusive mixing. Note that large molecules in water (ρ o ≈ 55.5 mol L -1 ) typically have diffusion constants in the range: 10 -5 -10 -6 cm 2 s -1 . For any relatively rigid enantiomeric molecule, the formalism presented here allows computation of the molecular pitch. Once a solvent is selected, both the number density and translational diffusion constant can be estimated. All that remains, then, is to find a vorticity that would make separation possible on the centimeter scale.