Abstract
For the formation of well defined Liesegang rings in different gel media, it is essential to study the effect of gel medium on the condition of the insoluble salt. In case of mercuric chromate, the well defined rings were developed in agar agar and starch gel as the sol formed is coagulable by one of the reactants. In gelatin medium, a very stable sol of mercuric chromate is formed, which is coagulated by hydrochloric acid. Beautiful bands of mercuric chromate were formed in gelatin gel only in presence of hydrochloric acid.
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