Complex formation between Ce(III) and NO3- or SO4-2 in aqueous salt solutions

Authors

  • B. Voleisiene Kaunas University of Technology
  • A. Voleisis Kaunas University of Technology

Abstract

Ultrasound velocity dispersion was investigated in aqueous solutions of Ce(NO3)3 and Ce2(SO4)4. The conclusion was made that ultrasound velocity dispersion has been caused by the association of Ce3+ with NO3-1 or SO4-2 and formation of inner sphere complexes [CeNO3+2]aq or [CeSO4+1]aq. The rate constants formation for Ce(111) complexes has been evaluated. The data of relaxation parameters of solutions Ce(NO3)3 and Ce2(SO4)3 are compared. The magnitude of ultrasound dispersion for Ce(NO3)3 is much smaller than that of Ce3(SO4)3 solutions. In order to produce an appreciable concentration of inner complexes in the Ce(NO3)3 solutions for a similar dispersion and relaxation a tenfold higher concentrations of the nitrates must be used

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Published

1997-06-12

Issue

Vol. 27 No. 1 (1997)

Section

PHYSICAL ACOUSTICS

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