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Copper (II) Ion Binding in Polyacrylic Acid
Author(s) -
Marinsky J. A.,
Imai N.,
Lim M. C.
Publication year - 1973
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197300057
Subject(s) - chemistry , polyacrylic acid , potentiometric titration , polyelectrolyte , stability constants of complexes , polymer , copper , ion , constant (computer programming) , inorganic chemistry , volume (thermodynamics) , thermodynamics , organic chemistry , physics , computer science , programming language
The complexing of Cu(II) by polyacrylic acid has been investigated. Potentiometric measurements have been employed to facilitate the experimental program. The stability constant of CuA 2 , the dominant species observed, has been determined to be approximately 6.5 × 10 3 , a value in good agreement with the formation constant of 4.25 × 10 3 reported for Cu(acetate) 2 . The quantitative evaluation of this stability constant is made possible by (1) correcting for complication arising from the large and variable electric field at the surface of the polyelectrolyte in the polymer domain and by (2) expressing the concentration of polymer species in terms of the polymer domain volume.