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  • 1
    Electronic Resource
    Electronic Resource
    Mixed halide complexes of lead. A comparison with theoretical predictions (1982)
    Springer
    Journal of solution chemistry 11 (1982), S. 127-136 
    Details
    ISSN: 1572-8927
    Keywords: Lead ; lead bromide ; lead chloride ; mixed ligand ; complexation ; spectroscopic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Experimentally and theoretically derived formation constants of mixed lead halide complexes are compared at 25.0°C and one molar ionic strength. The formation constant of PbBrCl, β11=79±10, is somewhat larger than the theoretical results, β11=55, predicted using the formation constants of PbBr2 and PbCl2. The molar absorptivity of PbBrCl was observed to be intermediate in character between the molar absorptivities of PbBr2 and PbCl2. Determinations of the formation constants of PbBr2Cl− and PbBrCl2 − are in reasonable agreement with the predictions based on the formation constants of PbBr3 − and PbCl3 −. Mixed ligand species dominated the complexation scheme of Pb(II) in our test media.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01036380
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Lead chloride complexation using ultraviolet molar absorptivity characteristics (1981)
    Springer
    Journal of solution chemistry 10 (1981), S. 243-251 
    Details
    ISSN: 1572-8927
    Keywords: Lead chloride ; molar absorptivity ; complexation ; medium dependence ; ultraviolet ; spectroscopic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The molar absorptivities of Pb2+, PbCl+, PbCl2, and PbCl 3 − were obtained between 210 and 300 nm. Molar absorptivity data were used to determine lead speciation directly from Pb(II) absorbance characteristics in a variety of media including natural seawater. The absorbance characteristics of lead in a particular chloride medium reveal the lead chloride formation constants appropriate to that medium. Our analyses indicate that lead chloride formation constants are significantly smaller in MgCl2 media than in HCl at constant ionic strength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00645013
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Ultraviolet spectroscopic study of ferric hydroxide complexation (1978)
    Springer
    Journal of solution chemistry 7 (1978), S. 373-383 
    Details
    ISSN: 1572-8927
    Keywords: Ferric ; hydrolysis ; ionic strength ; temperature ; enthalpy ; ferric hydroxide ; ultraviolet ; spectroscopic
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Ultraviolet absorbance spectra of ferric ions in 0.68m NaClO4 were studied as a function of pH at 4.0, 14.9, and 25.0°C. The results provided an evaluation of the stability constant for the formation of FeOH2+ which is *β1=[FeOH +][H +]/[Fe 3+]. The enthalpy change for the reaction Fe3++H2O⇌ FeOH2++H+ was calculated as 10.0±0.3 kcal-mole−1. Increasing temperature was also found to promote the reaction Fe3++2H2O⇌ Fe(OH) 2 + +2H+. Our results were combined with the results of other to produce an expression describing the first hydrolysis equilibrium at ionic strengths between 0 and 3m and temperatures between 4.0 and 45.0°C at 1 atm total pressure. At 25°C and 0.68m the ionic strength *β1=1.90×10-3
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00662897
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    Paper (German National Licenses)
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