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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 333 (1964), S. 154-159 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Die Natur der sich beim Ansäuern von Na2WO4-Lösungen bildenden Polywolframationen wurde durch pH- und konduktometrische Messungen (Glaselektrode- und Leitfähigkeitsstitrationen) unter Anwendung der JOBschen Methode der kontinuierlichen Variation untersucht. Für die Säuregrade 8 H+: 7 W (pH 5.8-6,2) und 9 H+: 6 W (pH 3,75 bis 4,25) wird auf die Bildung von W7O246--Para- bzw. W4O132--Metawolframationen geschlossen.
    Notes: The precise nature of the poly-anions formed by the action of acids (HCl, HNO3, H2SO4, and CCl3COOH) on sodium tungstate solutions has been studied by pH and conductometric measurements involving glass electrode and conductometric titrations and by the application of JOBschen method of continuous variation. The breaks, inflexions and maxima in curves indicate the formation of poly-tungstate ions. para W7O246- at pH range 5.8-6.2, and meta W4O132- at pH 3.75-4.25 corresponding to the ratios 7 W : 8 H+; 6 W : 9 H+, respectively.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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