Journal of Solution Chemistry

, Volume 9, Issue 4, pp 269–277 | Cite as

Copper(II) ion hydrolysis in aqueous solution

  • Anthony J. Paulson
  • Dana R. Kester
Article
Received:
Revised:

Abstract

A copper(II) ion-selective-electrode potentiometric method was used to determine the first and second hydrolysis constants of Cu2+. Special techniques prevented copper(II) hydroxide precipitation, and copper(II) carbonate and cipper(II) organic complexation during the titration of the experimental solution over the pH range 6.8–8.4. The large change in the total copper concentration during the titration due to adsorption of copper onto the vessel walls was accounted for by measuring the total copper concentration at each pH by atomic absorption spectrophotometry. The two hydrolysis constants were determined at 25°C in 0.7 and 0.05m NaClO4 media. The measured stability constants are independent of the copper concentration and yield similar zero ionic strength values. Also, the stepwise equilibrium constants decrease as the ligand number increases.

Key words

Copper(II) hydrolysis potentiometry stability constants 
This is a preview of subscription content, log in to check access.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    H. Ohtaki,Inorg. Chem. 7, 1205 (1968).Google Scholar
  2. 2.
    H. Kakihana, T. Amaya, and M. Maeda,Bull. Chem. Soc. Jpn. 43, 3155 (1970).Google Scholar
  3. 3.
    D. D. Perrin,J. Chem. Soc. 3, 3189 (1960).Google Scholar
  4. 4.
    F. Achenza,Ann. Chim. 54, 240 (1964).Google Scholar
  5. 5.
    G. Arena, R. Cali, E. Rizzarelli, and S. Sammartona,Thermochim. Acta 16, 315 (1976).Google Scholar
  6. 6.
    A. O. Gubeli, J. Herbert, P. A. Cote, and R. Taillon,Helv. Chim. Acta 53, 186 (1970).Google Scholar
  7. 7.
    V. B. Spivakovskii and G. V. Makovskaya,Russ. J. Inorg. Chem. 13, 815 (1968).Google Scholar
  8. 8.
    R. C. Hittinger, M.S. Thesis, University of Rhode Island (1975).Google Scholar
  9. 9.
    W. Sunda, Ph.D. Dissertation, Massachusetts Institute of Technology (1975).Google Scholar
  10. 10.
    J. Vuceta and J. J. Morgan,Limnol. Oceanogr. 22, 742 (1977).Google Scholar
  11. 11.
    A. J. Paulson, M.S. Thesis, University of Rhode Island (1978).Google Scholar
  12. 12.
    D. R. Kester, inThe Ocean Handbook, R. A. Horne, ed., to be published by Marcel Dekker, New York.Google Scholar
  13. 13.
    J. Kielland,J. Am. Chem. Soc. 59, 1675 (1937).Google Scholar
  14. 14.
    C. F. Baes and R. E. Mesmer,The Hydrolysis of Cations (Wiley-Interscience, New York, 1976).Google Scholar
  15. 15.
    G. J. M. Heijne and W. E. van der Linden,Anal. Chim. Acta 96, 13 (1978).Google Scholar
  16. 16.
    P. W. Schindler,Adv. Chem. Ser. 67, 196 (1967).Google Scholar

Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • Anthony J. Paulson
    • 1
  • Dana R. Kester
    • 1
  1. 1.Graduate School of OceanographyUniversity of Rhode IslandKingston

Personalised recommendations