Solubility products of basic salts Cu2(OH)3NO3 and Hg3O2(NO3)2, determined from dilatometric data

Sal'nikov, Yu. I.; Sidorov, Yu. V.; Burkov, K. A.

doi:10.1134/s1070427208070343

Cited by 4 publications

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“…The experimental solubility products were converted to Gibbs energies of formation using tabulated thermodynamic data for the ions in aqueous solution (Wagman et al, 1982). The solubility products for both rouaite and gerhardtite are at least a factor of 10 3 less than those reported by Sal'nikov et al (2008), Ilcheva and Bjerrum (1976) and Bjerrum (1931). This difference may be due to the different media and concentrations employed (e.g.…”

Section: Solubilities and Gibbs Energies Of Formationmentioning

confidence: 52%

“…This difference may be due to the different media and concentrations employed (e.g. Ilcheva and Bjerrum (1976) used 2 M methylammonium nitrate), the use of different techniques for the evaluation of the equilibria involved (Sal'nikov et al (2008) used dilatometry), or the purity of the compounds. Ilcheva and Bjerrum (1976) provided the solubility product for synthetic gerhandtite, which, based on our work, is probably rouaite.…”

Section: Solubilities and Gibbs Energies Of Formationmentioning

confidence: 99%

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The synthesis and solubility of the copper hydroxyl nitrates: gerhardtite, rouaite and likasite

et al. 2010

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Syntheses for the three members of the copper hydroxyl nitrate family – the polymorphs rouaite and gerhardtite, and likasite – are presented along with powder diffraction data and unit-cell parameters. The solubilities, determined in 0.05 M KNO3solution after equilibration at 25°C for 10 days were used to calculate activity-based solubility product constants. The Gibbs energies of formation, obtained from the solubility products, are –653.2±0.7 kJ/mol, –655.1±1.2 kJ/mol and –1506.4±1.1 kJ/mol, for rouaite, gerhardtite, and likasite (Cu3NO3(OH)5·2H2O), respectively. The values for the polymorphs rouaite and gerhardtite validate the observations of Oswald that gerhardtite is the most stable polymorph at room temperature and that the preparation of predominantly rouaite in syntheses carried out at room temperature must be due to the metastability and low rate of conversion to the more stable gerhardtite.

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Section: Solubilities and Gibbs Energies Of Formationmentioning

confidence: 52%

Section: Solubilities and Gibbs Energies Of Formationmentioning

confidence: 99%