caa a22 4500 378881906 CHVBK 20180305123434.0 cr unu---uuuuu 161128e20030301xx s 000 0 eng 10.1524/ract.91.3.169.19978 doi (NATIONALLICENCE)gruyter-10.1524/ract.91.3.169.19978 Thermodynamic modeling of metal-ligand interactions in high ionic strength NaCl solutions: the Ni2+-oxalate system [Elektronische Daten] [M. Borkowski, Gregory R. Choppin, Robert C. Moore] Stability constants for the 1:1 and 1:2 complexes of Ni(II)+Oxalate have been determined using solvent extraction. Data collected in 0.3m to 5.0m NaCl aqueous solutions at 20.0±0.1°C yielded values of log β101 ranging from 3.71 to 3.98(±0.06) and of log β102 from 6.44 to 6.95(±0.06), which agree well with values from the literature. The data were analyzed by the Pitzer model with a value of μ0/RT=-17.47 for the 1:1 complex calculated from the data and literature values. A single neutral-ion interaction parameter λNiOx-Cl=-0.179 was used to describe the ionic strength dependence of the 1:1 complex. For the 1:2 complex, a value for μ0/RT=-11.31 and the Pitzer parameters values, β0NiOx₂²⁻-Na⁺=-0.0644 and β1NiOx₂²⁻-Na⁺=0.8545, were determined. These standard chemical potential values are based on a model for oxalate deprotonation reported earlier. © 2003 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Borkowski M. aut Choppin Gregory R. aut Moore Robert C. aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/3/2003(2003-03-01), 169-172 0033-8230 91:3/2003<169 2003 91 ract https://doi.org/10.1524/ract.91.3.169.19978 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.91.3.169.19978 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Borkowski M. aut NATIONALLICENCE 700 1- Choppin Gregory R. aut NATIONALLICENCE 700 1- Moore Robert C. aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 91/3/2003(2003-03-01), 169-172 0033-8230 91:3/2003<169 2003 91 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence SWISSBIB 378608169 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter