title: An investigation on calcium (II) oxalate as solubility and universal standard.
abstract: The investigation on calcium (II) oxalate is carried out in order to study its solubility in different ionic media. In the same conditions the protonation constants of oxalate and the stability of complex species have been determined. As the stoichiometric composition of the solid calcium (II) oxalate prepared for the investigation was accurately checked, the salt CaC2O4 x H2O is proposed as universal (chelometry, redox, acidimetry) standard. Results of titrations support this possibility.
authors.affiliation: Dipartimento di Chimica, Università "La Sapienza", P.le A. Moro 5, 00185 Roma, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Antonilli
authors.forename: Emilio
authors.initials: E
authors.lastname: Bottari
authors.forename: Maria Rosa
authors.initials: MR
authors.lastname: Festa
authors.forename: Lorella
authors.initials: L
authors.lastname: Gentile
mesh_terms: D002122:Calcium Chloride / Q000737:chemistry; D002129:Calcium Oxalate / Q000737:chemistry*; D007477:Ions; D010070:Oxalates / Q000032:analysis; D010084:Oxidation-Reduction; D011522:Protons; D012995:Solubility; D013816:Thermodynamics; D014867:Water
chemical_list: D007477:Ions; D010070:Oxalates; D011522:Protons; D014867:Water; D002129:Calcium Oxalate; D002122:Calcium Chloride