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Electrometric Studies on the Acid‐Tungstate System and the formation of poly‐anions
Author(s) -
Saxena R. S.,
Sharma O. P.
Publication year - 1964
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19643330121
Subject(s) - tungstate , sodium tungstate , chemistry , titration , conductometry , inorganic chemistry , ion , nuclear chemistry , tungsten , organic chemistry
The precise nature of the poly‐anions formed by the action of acids (HCl, HNO 3 , H 2 SO 4 , and CCl 3 COOH) 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 W 7 O 24 6−at pH range 5.8–6.2, and meta W 4 O 13 2−at pH 3.75–4.25 corresponding to the ratios 7 W : 8 H + ; 6 W : 9 H + , respectively.