Abstract
The spacing laws of Jablczynski and Mathur are applied to the Liesegang rings of cobalt(II) oxinate, silver iodide and lead chromate in agar gel. Although Jablczynski’s spacing law satisfactorily explains the direct Liesegang rings, it totally fails to describe the revert Liesegang rings. Similary though Mathur’s spacing law is applicable to both revert and direct types of periodic precipitation, an appreciable deviation is observed in systems with greater interspacing. A new spacing law, applicable to both revert and direct Liesegang rings, is proposed on the basis of the preferential adsorption theory of Liesegang rings. It is experimentally verified with silver iodide and lead chromate systems.
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Kanniah, N., Gnanam, F.D. & Ramasamy, P. A new spacing law for Liesegang rings. Proc. Indian Acad. Sci. (Chem. Sci.) 93, 801–811 (1984). https://doi.org/10.1007/BF02866341
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DOI: https://doi.org/10.1007/BF02866341