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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 133 (1953), S. 32-34 
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurde die Wirkung der Löslichkeit von Silberchromat bei der Bildung von Liesegang-Ringen untersucht, da dieses weitgehend unlösliche Salz eine starke Variation seiner Löslichkeit bei Änderung der Wasserstoffionenkonzentration zeigt. Liesegang-Ringe besitzen größere Abstände bei gesteigerter Löslichkeit des Silberchromats durch höhere Azidität des Mediums. Die Ringe werden schärfer, wenn verdünnte Chromatlösungen oder Nitratlösungen verwendet werden. Es müssen beträchtliche Unterschiede in der Konzentration der zwei reagierenden Lösungen bestehen, wobei die von außen diffundierende immer die konzentriertere sein muß. Die günstigsten Konzentrationsverhältnisse wurden bestimmt.
    Notes: Abstracts The effect of the solubility of insoluble silver chromates in the formation of Liesegang rings has been studied as this insoluble salt shows a marked yariation in its solubility with the change in hydrogen ion concentration. The Liesegang rings are less closely packed as the solubility of silver chromate is increased with the increasing acidity of the medium. Rings become more distinct as the chromate solutions used are diluted or the concentrated solution of silver nitrate diffusing from the top is diluted. There should be considerable difference in the concentrations of the two interacting solutions, the one diffusing from the top being always concentrated. Concentrations of the interacting solutions, suited for well defined rings in the gelatin medium, have been determined.
    Type of Medium: Electronic Resource
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