Solubility of ferrate(VI) in NaOH - KOH mixtures at different temperatures

Virender K. Sharma, Zuzana MácOvá, Karel Bouzek, Frank J Millero

Research output: Contribution to journalArticle

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Abstract

The solubility of potassium ferrate(VI) (K2FeO4) was measured in a mixture solution containing various molar ratios of KOH and NaOH at a total concentration of 14 M from (10 to 60) °C. The solubility of K2FeO4 decreased necause of the presence of K+ in the solution mixture. The solubility (S*) was expressed as log S* = 5.830-2019/T-5.845XK+ 0.5 + 1.595XK+ + 724XK+ 0.5/T (σ = 0.024), where XK+ is the mole fraction of K+ in the solution mixture and T is in Kelvin. A comparison of the values of S* in different alkali metal hydroxide solutions showed that the solubility of K2FeO4 was diminished in KOH and CsOH and similarly in LiOH and NaOH solutions. The solubility product constant (Ksp*), calculated from the solubility measurements, was given as log Ksp* = 18.10-6055/T-17.535XK+ 0.5 + 4.785XK+ + 2171XK+ 0.5/T (σ = 0.061). The heat of dissolution (ΔHdiss) decreased linearly with an increase in the mole fraction of K+ ions. The significance of the solubility results is briefly discussed.

Original languageEnglish (US)
Pages (from-to)5594-5597
Number of pages4
JournalJournal of Chemical and Engineering Data
Volume55
Issue number12
DOIs
StatePublished - Dec 9 2010

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Solubility
Temperature
Alkali Metals
Alkali metals
ferrate ion
Potassium
Dissolution
Ions
potassium ferrate

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Solubility of ferrate(VI) in NaOH - KOH mixtures at different temperatures. / Sharma, Virender K.; MácOvá, Zuzana; Bouzek, Karel; Millero, Frank J.

In: Journal of Chemical and Engineering Data, Vol. 55, No. 12, 09.12.2010, p. 5594-5597.

Research output: Contribution to journalArticle

Sharma, Virender K. ; MácOvá, Zuzana ; Bouzek, Karel ; Millero, Frank J. / Solubility of ferrate(VI) in NaOH - KOH mixtures at different temperatures. In: Journal of Chemical and Engineering Data. 2010 ; Vol. 55, No. 12. pp. 5594-5597.
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