Acidity measurements at elevated temperatures. V. Aluminum ion hydrolysis

Mesmer, R.E.; Baes, C.F.

doi:10.1021/ic50104a040

Cited by 113 publications

(55 citation statements)

References 5 publications

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“…Potentiometric techniques are featured prominently in experiments designed to measure precisely the hydrolysis equilibria in aluminum salt solutions (1)(2)(3)(4). These and other studies suggest that at very low total aluminum concentrations (about 10 -5 M) the mono-nuclear complexes AI(OH) ~+ and AI(OH)2 +, are present in significant amounts.…”

Section: Introductionmentioning

confidence: 99%

“…The best quantitative evidence for this conclusion is furnished by the precise measurements of Kubota (5) and Nazarenko and Nevskaya (6). At increasing A1 concentrations the formation of polynuclear hydroxo-complexes are called upon to explain the experimental data (2)(3)(4)(7)(8)(9). Unfortunately, no general consensus of opinion exists as to the exact identity and number of such polymeric species in solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Vermeulen

Geus

Stol

et al. 1975

Journal of Colloid and Interface Science

110

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Acidified aluminum nitrate solutions were fitrated with alkali (NaOH or KOH) over a temperature range of 24°C to 90°C. A homogeneous distribution of added base was achieved by: (i) in situ decomposition of urea (90°C); and (ii) a novel method involving injection through a capillary submerged in the agitated salt solution.The experimental pH curves are characterized by two plateaus (or platforms) separated by a steep jump in pH. These characteristic features were not previously observed in continuous titration experiments. This is especially true of the second platform, which begins at an OH/A1 ratio larger than 2.5. Stable colloidal solutions or gels are formed on traversing this plateau. The hydrolysis-precipitation behavior was also followed by light scattering and x-ray diffraction measurements.A qualitative picture of the neutralization process is developed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Vermeulen

Geus

Stol

et al. 1975

Journal of Colloid and Interface Science

110

View full text Add to dashboard Cite

show abstract

“…Aveston (8) found dimer A12(OH)i+ and tridecamer All3(0H)i: in 1 M NaC10, medium. Mesmer and Baes (9) found A12(0H)$+, A13(OH):+, and All3(0H)i: at elevated temperatures (62.5-149. 8 (19,20) only dimer was found.…”

Section: Introductionmentioning

confidence: 98%

“…Although aqueous hydrolysis of aluminum(III) ion has been studied extensively (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) the composition and stability of its predominating hydrolytic complexes remains unclear. Kubota's data (5) indicate that monomer Al(OH)2+ is formed in a wide range of concentration of sodium perchlorate media (0.01-1 .…”

Section: Introductionmentioning

confidence: 99%

Hydrolysis of aluminum(III) ion in sodium nitrate medium

Milić¹,

Bugarčić²,

Đjurdjević³

1991

Can. J. Chem.

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Chem. 69, 28 (1991). Hydrolysis of aluminum(II1) ion in 3.0 M (Na)N03 medium was studied by emf method at 25°C. Data cover the range 1-78 rnM AI(II1) within the pH range of 2.0-4.5. At a definite pH, the extent of hydrolysis increases with increasing aluminium concentration, thereby indicating the presence of polynuclear hydrolysis products. The least squares treatment of the data indicates the formation of polynuclear hydrolytic complexes A 1 2 ( 0~) i f , Al2(OH):+, and Al3(OH)T. With the reactions written in the form p A13+ + qH20 * A~~( O H )~~~-~) + qH+ the stability constants obtained were log PZv2 = -7.55 2 0.21, log P2,4 = -16.41 f 0.13, and log P3,4 = -13.24 * 0.08.Distribution curves indicate that the complex A13(O~)$+ is predominant.

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“…This close agreement demonstrates tion 'Onstants for weak acids and bases 2). that the apparatus described here is capable of In two recent publications Mesmer et (37 4) yielding precise acidity measurements in high described an electrolyte concentration cell with temperature water. These concentration cell liquid junction (i.e.…”

Section: Introductionmentioning

confidence: 99%

High Temperature Aqueous Electrolyte Concentration Cells and the Ionization of Liquid Water to 200 °C

Macdonald¹,

Butler²,

Owen³

1973

Can. J. Chem.

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High temperature aqueous electrolyte concentration cells with and without liquid junction are described. These cells were used to measure the ionization constant of water in 0.1,0.25,0.5, and 1.0 mol/kg KC1 solutions at temperatures to 200 "C. Extrapolation to infinite dilution yielded the following functions for the temperature dependence of log KW0 and the thermodynamic parameters for ionization: log [Traduit par le journal]

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Acidity measurements at elevated temperatures. V. Aluminum ion hydrolysis

Cited by 113 publications

References 5 publications

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Hydrolysis-precipitation studies of aluminum (III) solutions. I. Titration of acidified aluminum nitrate solutions

Hydrolysis of aluminum(III) ion in sodium nitrate medium

High Temperature Aqueous Electrolyte Concentration Cells and the Ionization of Liquid Water to 200 °C

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