Use of Pitzer's equations to determine the media effect on the formation of lead chloro complexes

Details Use of Pitzer's equations to determine the media effect on the formation of lead chloro complexes Use of Pitzer's equations to determine the media effect on the formation of lead chloro complexes

May 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.1145m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 48, Issue 5, pp.1145-1150

Computer Science

1

Scientific paper

The spectrophotometric measurements of chloro complexes of lead in aqueous HCl, NaCl, MgCl 2 and CaCl 2 solutions at 25°C have been analyzed using Pitzer's specific interaction equations. Parameters for activity coefficients of the complexes PbCl + , PbCl 2 0 and PbCl 3 - have been determined for the various media. Values of K 1 = 30.0 ± 0.6, K 2 = 106.7 ± 2.1 and K 3 = 73.0 ± 1.5 were obtained for the cumulative formation constants. [ Pb 2+ + nCl - PbCl n 2- n )]. These values are in reasonable agreement with literature data. The Pitzer parameters for the PbCl ion pairs in various media were used to calculate the speciation of Pb 2+ in an artificial seawater solution.

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