ABSTRACT
Molecular diffusion is concerned with movement of individual molecules through a substance by virtue of their thermal energy, the kinetic theory of gases gives an idea about visualizing molecular diffusion and what exactly happens and indeed the success of this theory is quantitatively helpful in describing diffusional phenomena due to which it is widely accepted. Thus the phenomenon of molecular diffusion leads to completely uniform concentration of substances in a solution that may initially be in uniform concentration, however it is necessary to differentiate between molecular diffusion and more rapid mixing as molecular diffusion is a slow process, rapid mixing can be done by mechanical stirring and convective fluid movement. Mechanical stirring generally results in rapid movement of large eddies of fluid which is a characteristic of turbulent motion.
