From an examination of the various theories proposed to a account for the formation of Liesegang rings, it appears that the application of the ordinary diffusion law is quite adequate.
Up to now, no completely rigorous solution of the diffusion euqat...
From an examination of the various theories proposed to a account for the formation of Liesegang rings, it appears that the application of the ordinary diffusion law is quite adequate.
Up to now, no completely rigorous solution of the diffusion euqations under proper boundary condition has been carried out.
This is due principally to the mathematical difficulties involved.
The revised coagulation theory has been surveyed to explain the periodic precipitation, taking Adair's solution for Pick's law of diffusion. The estimations of the reduced concentration of the sol(C_30) and the flocculation value(Γ) have been made by this theory.
The time law of Mores and Pierce, and the spacing law of Jablczynski have been critically reviewed and derived by taking Riemann's solution for Fick's diffusion equation.
It has been assumed that the distribution of the concentration product of the ions is represented a simple harmonic curve whose amplitude diminishes exponentially to zero with increasing distance.
The condition for the precipitation is that the ionic product should exceed or be equal to the solubility roduct of the sparingly soluble compound at the point.