DOI: 10.1246/bcsj.50.2927. Hydrolytic Behavior of Oxovanadium(IV) Ions

Hydrolytic Behavior of Oxovanadium(IV) Ions

10.1246/bcsj.50.2927

Crossref journal-article

Oxford University Press (OUP)

Bulletin of the Chemical Society of Japan (286)

Abstract

Abstract The hydrolysis of VO2+ was investigated in 0.1 M LiClO4 by potentiometric, conductometric and turbidimetric measurements. The following values of the equilibrium constants were obtained: β11=[VOOH+] [H+]⁄[VO2+]=9.0×10−6 M (M=mol dm−3); β22=[(VO)2(OH)22+][H+]2⁄[VO2+]2=1.9×10−7 M. The solubility product of VO(OH)2 given by Kspl=[VO2+][OH−]2 was found to be 6.6×10−23 M3 from the pH values at which precipitation occurs. Only one species with a stoichiometric ratio VO/OH=2.5 is present in basic solutions in the pH range 9–12. The solubility product of VO(OH)2 given by Ksp2=[H+][(VO)2(OH)5−] is logKsp2=−11.1. A less soluble salt Na(VO)2(OH)5 or NaHV2O5 was isolated from strongly basic solutions. Measurements of Na+ concentration at which the solid phase first appears give logKsp3=−3.74 as its solubility product, Ksp3=[Na+][(VO)2(OH)5−].

Bibliography

Komura, A., Hayashi, M., & Imanaga, H. (1977). Hydrolytic Behavior of Oxovanadium(IV) Ions. Bulletin of the Chemical Society of Japan, 50(11), 2927â2931.

Authors 3

Akitoshi Komura (first)
Mutsuo Hayashi (additional)
Hiroto Imanaga (additional)

References 18 Referenced 79

Dates

Type	When
Created	19 years, 1 month ago (July 19, 2006, 10:56 p.m.)
Deposited	1 year, 7 months ago (Jan. 17, 2024, 3:19 a.m.)
Indexed	1 year ago (Aug. 19, 2024, 10:29 a.m.)
Issued	47 years, 10 months ago (Nov. 1, 1977)
Published	47 years, 10 months ago (Nov. 1, 1977)
Published Online	19 years, 4 months ago (April 19, 2006)
Published Print	47 years, 10 months ago (Nov. 1, 1977)

Funders 0

None

BibTeX

@article{Komura_1977, title={Hydrolytic Behavior of Oxovanadium(IV) Ions}, volume={50}, ISSN={1348-0634}, url={http://dx.doi.org/10.1246/bcsj.50.2927}, DOI={10.1246/bcsj.50.2927}, number={11}, journal={Bulletin of the Chemical Society of Japan}, publisher={Oxford University Press (OUP)}, author={Komura, Akitoshi and Hayashi, Mutsuo and Imanaga, Hiroto}, year={1977}, month=nov, pages={2927–2931} }

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  "abstract": "<jats:title>Abstract</jats:title>\n               <jats:p>The hydrolysis of VO2+ was investigated in 0.1 M LiClO4 by potentiometric, conductometric and turbidimetric measurements. The following values of the equilibrium constants were obtained: \u03b211=[VOOH+] [H+]\u2044[VO2+]=9.0\u00d710\u22126 M (M=mol dm\u22123); \u03b222=[(VO)2(OH)22+][H+]2\u2044[VO2+]2=1.9\u00d710\u22127 M. The solubility product of VO(OH)2 given by Kspl=[VO2+][OH\u2212]2 was found to be 6.6\u00d710\u221223 M3 from the pH values at which precipitation occurs. Only one species with a stoichiometric ratio VO/OH=2.5 is present in basic solutions in the pH range 9\u201312. The solubility product of VO(OH)2 given by Ksp2=[H+][(VO)2(OH)5\u2212] is logKsp2=\u221211.1. A less soluble salt Na(VO)2(OH)5 or NaHV2O5 was isolated from strongly basic solutions. Measurements of Na+ concentration at which the solid phase first appears give logKsp3=\u22123.74 as its solubility product, Ksp3=[Na+][(VO)2(OH)5\u2212].</jats:p>",
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