113. Ion-pair constants of some chloropentamminecobalt(III) salts from pH (glass electrode) and solubility measurements

Archer, D. W.; East, D. A.; Monk, C. B.

doi:10.1039/jr9650000720

Cited by 18 publications

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“…Note that the concurrent protonation reactions of phthalate ions in the aqueous phase influences the adsorption p K values, and are therefore included in the model. The p K value for the formation of the Na-phthalate ion-pair is –0.7 [ 53 ], which was also included in the model via the IExFit user defined database. The calculated Na-phthalate ion-pair concentrations accounted for less than 1% of the total aqueous phthalate concentrations for all conditions below pH 10.5.…”

Section: Resultsmentioning

confidence: 99%

Modeling the adsorption of hydrogen, sodium, chloride and phthalate on goethite using a strict charge-neutral ion-exchange theory

Schulthess

Ndu

2017

PLoS ONE

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Simultaneous adsorption modeling of four ions was predicted with a strict net charge-neutral ion-exchange theory and its corresponding equilibrium and mass balance equations. An important key to the success of this approach was the proper collection of all the data, particularly the proton adsorption data, and the inclusion of variable concentrations of conjugate ions from the experimental pH adjustments. Using IExFit software, the ion-exchange model used here predicted the competitive retention of several ions on goethite by assuming that the co-adsorption or desorption of all ions occurred in the correct stoichiometries needed to maintain electroneutrality. This approach also revealed that the retention strength of Cl− ions on goethite increases in the presence of phthalate ions. That is, an anion-anion enhancement effect was observed. The retention of Cl− ions was much weaker than phthalate ions, and this also resulted in a higher sensitivity of the Cl− ions toward minor variations in the surface reactivity. The proposed model uses four goethite surface sites. The drop in retention of phthalate ions at low pH was fully described here as resulting from competitive Cl− reactions, which were introduced in increasing concentrations into the matrix as the conjugate base to the acid added to lower the pH.

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Section: Resultsmentioning

confidence: 99%

Modeling the adsorption of hydrogen, sodium, chloride and phthalate on goethite using a strict charge-neutral ion-exchange theory

Schulthess

Ndu

2017

PLoS ONE

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“…outside experimental error. Therefore if C10 4-ion interacts with Co(II) [6], complex cobalt cations [7,8], nickel (II) [6], and iron (III) [9,10], it does so in a manner which does not alter the correlation time or the quadrupole coupling constant of the asC1 nucleus.…”

Section: Methodsmentioning

confidence: 95%

³⁵Cl N.M.R. relaxation in aqueous sodium perchlorate solutions

Craighead

Bryant

1975

Molecular Physics

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The relaxation time, Tip, for ~5C1 in perchlorate ion in aqueous solutions is found to be 0.25 s. Tip is insensitive to the presence of most first row transition metals; however, a weak complex with manganous ion is demonstrated, and the perchlorate ion-manganous exchange rate is shown to be between 3 • 10 ~ s -1 and 3-6 x 107 s -1. In the absence of manganous ion, the relaxation is dominated by the nuclear electric quadrupole interaction; however, a dipolar contribution is observed with manganous ion present.

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“…Preparation of 1 M HC1 Containing H2lsO Tracer.-A solution of 1 M HC1 in 1.44 ± 0.01 atom % 180-labeled water was prepared by diluting 2.06 ml. of concentrated HC1 (12.1 M) to 25 ml. with 1.55 atom % ,sO-labeled water.…”

Section: Methodsmentioning

confidence: 99%

Mechanism of the Acid Hydrolysis of the Iodopentaaquochromium(III) Ion. Evidence for a trans Effect of Iodide in a Chromium(III) Complex

Moore¹,

Basolo²,

Pearson³

1966

Inorg. Chem.

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113. Ion-pair constants of some chloropentamminecobalt(III) salts from pH (glass electrode) and solubility measurements

Cited by 18 publications

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Modeling the adsorption of hydrogen, sodium, chloride and phthalate on goethite using a strict charge-neutral ion-exchange theory

Modeling the adsorption of hydrogen, sodium, chloride and phthalate on goethite using a strict charge-neutral ion-exchange theory

³⁵Cl N.M.R. relaxation in aqueous sodium perchlorate solutions

Mechanism of the Acid Hydrolysis of the Iodopentaaquochromium(III) Ion. Evidence for a trans Effect of Iodide in a Chromium(III) Complex

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113. Ion-pair constants of some chloropentamminecobalt(III) salts from pH (glass electrode) and solubility measurements

Cited by 18 publications

References 0 publications

Modeling the adsorption of hydrogen, sodium, chloride and phthalate on goethite using a strict charge-neutral ion-exchange theory

Modeling the adsorption of hydrogen, sodium, chloride and phthalate on goethite using a strict charge-neutral ion-exchange theory

35Cl N.M.R. relaxation in aqueous sodium perchlorate solutions

Mechanism of the Acid Hydrolysis of the Iodopentaaquochromium(III) Ion. Evidence for a trans Effect of Iodide in a Chromium(III) Complex

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³⁵Cl N.M.R. relaxation in aqueous sodium perchlorate solutions