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 CuA2, the dominant species observed, has been determined to be approximately 6.5 × 103, a value in good agreement with the formation constant of 4.25 × 103 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.
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Marinsky et al. (1973) studied this question.
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