Electrical conductance, diffusion, viscosity, and density of sodium nitrate, sodium perchlorate, and sodium thiocyanate in concentrated aqueous solutions

Janz, George J.; Oliver, Barry G.; Lakshminarayanan, G.; Mayer, George E.

doi:10.1021/j100701a022

Cited by 103 publications

(51 citation statements)

References 2 publications

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“…Sodium perchlorate background electrolyte solution of 0.700 ± 0.001 M was produced by dissolving ∼100 g of the salt in Milli-Q water in an acid-cleaned PMP volumetric flask and adjusting the density according to the empirical equation of Janz et al (1970). The final solution was acidified to pH 3.0 ± 0.1 with concentrated HClO 4 , which was determined to have a concentration of 11.40 ± 0.02 M by manual titration with 1.005 M NaOH to the phenol red endpoint (n = 7).…”

Section: Preparation Of Reagents and Standardsmentioning

confidence: 99%

Determination of the Side-Reaction Coefficient of Desferrioxamine B in Trace-Metal-Free Seawater

Schijf

Burns

2016

Front. Mar. Sci.

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Electrochemical techniques like adsorptive cathodic stripping voltammetry with competitive ligand equilibration (ACSV-CLE) can determine total concentrations of marine organic ligands and their conditional binding constants for specific metals, but cannot identify them. Individual organic ligands, isolated from microbial cultures or biosynthesized through genomics, can be structurally characterized via NMR and tandem MS analysis, but this is tedious and time-consuming. A complementary approach is to compare known properties of natural ligands, particularly their conditional binding constants, with those of model organic ligands, measured under suitable conditions. Such comparisons cannot be meaningfully interpreted unless the side-reaction coefficient (SRC) of the model ligand in seawater is thoroughly evaluated. We conducted series of potentiometric titrations, in non-coordinating medium at seawater ionic strength (0.7 M NaClO 4 ) over a range of metal:ligand molar ratios, to study complexation of the siderophore desferrioxamine B (DFOB) with Mg and Ca, for which it has the highest affinity among the major seasalt cations. From similar titrations of acetohydroxamic acid in the absence and presence of methanesulfonate (mesylate), it was determined that Mg and Ca binding to this common DFOB counter-ion is not strong enough to interfere with the DFOB titrations. Stability constants were measured for all DFOB complexes with Mg and Ca including, for the first time, the bidentate complexes. No evidence was found for Mg and Ca coordination with the DFOB terminal amine. From the improved DFOB speciation, we calculated five SRCs for each of the five (de)protonated forms of DFOB in trace-metal-free seawater, yet we also present a more convenient definition of a single SRC that allows adjustment of all DFOB stability constants to seawater conditions, no matter which of these forms is selected as the "component" (reference species). An example of Cd speciation in seawater containing DFOB illustrates the non-trivial use of different SRCs for polyprotic, polydentate organic ligands.

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Section: Preparation Of Reagents and Standardsmentioning

confidence: 99%

Determination of the Side-Reaction Coefficient of Desferrioxamine B in Trace-Metal-Free Seawater

Schijf

Burns

2016

Front. Mar. Sci.

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“…A template for the dynamic viscosity of a single-component solution is given in Equation (9.2). The data in Table II of Janz et al (1970) and Table 5 of Zaltash and Ally (1992) The correlation coefficient (r2) of the correlation was 0.995 and the error in viscosity was 10% or less. The data were given for 5 different temperatures and concentrations over a concentration range from 0 to 90 wt% NaNO3 and a temperature range from 273 to 433 K.…”

Section: Single Componentmentioning

confidence: 94%

Correlation models for waste tank sludges and slurries

Mahoney¹,

Trent²

1995

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“…Thus, the idea of ion association due to Coulomb forces arises, and a simplified theoretical description in the framework of the interionic theory should consider this aspect. with the experimental values of the conductance of the concentrated solutions from [27] are shown in figure 8.…”

Section: Computer Simulationsmentioning

confidence: 99%

“…One has Ö Ö Ó× ñº (27) Then, the non-equilibrium term ¼ ´Ö¸ñµ of the total correlation function can be formulated as…”

Section: -8 Conductivity Of Aqueous Sodium Nitratementioning

confidence: 99%

On the influence of molecular structure on the conductivity of electrolyte solutions - sodium nitrate in water

Krienke¹

2013

Condens. Matter Phys.

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Theoretical calculations of the conductivity of sodium nitrate in water are presented and compared with experimental measurements. The method of direct correlation force in the framework of the interionic theory is used for the calculation of transport properties in connection with the associative mean spherical approximation (AMSA). The effective interactions between ions in solutions are derived with the help of Monte Carlo and Molecular Dynamics calculations on the Born-Oppenheimer level. This work is based on earlier theoretical and experimental studies of the structure of concentrated aqueous sodium nitrate solutions.

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Electrical conductance, diffusion, viscosity, and density of sodium nitrate, sodium perchlorate, and sodium thiocyanate in concentrated aqueous solutions

Cited by 103 publications

References 2 publications

Determination of the Side-Reaction Coefficient of Desferrioxamine B in Trace-Metal-Free Seawater

Determination of the Side-Reaction Coefficient of Desferrioxamine B in Trace-Metal-Free Seawater

Correlation models for waste tank sludges and slurries

On the influence of molecular structure on the conductivity of electrolyte solutions - sodium nitrate in water

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