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Spectrophotometric Studies on the Chelate Formation between Zirconium(IV) and Chromotrope 2R
Author(s) -
Drupar S. C.,
Srivastava K. C.,
Banerji Samir K.
Publication year - 1973
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.197300026
Subject(s) - chemistry , zirconium , chelation , nuclear chemistry , complex formation , composition (language) , analytical chemistry (journal) , inorganic chemistry , chromatography , linguistics , philosophy
The composition and stability of the chelate formed between Zr(IV) and chromotrope 2R has been investigated using spectrophotometric methods. The chelate is violet in color and has λmax at 530 nm. The composition, determined by different methods is 1 : 1. The chelate is stable between p H 1.0‐3.0. The value of log K as determined by two different methods are 4.48±0.2 and 4.21±0.1 and the values of free energy of formation are —6.21±0.2 and —5.83±0.1 respectively at 30° C . The system obeys Beer's Law over a concentration range of 2.50 to 20.0 ppm of zirconium. The effective range of photometric determination is 3.50 to 19.05 ppm of zirconium.