The kinetics of the formation of polynuclear hydroxo complexes of iron(III), chromium(III), and scandium(III) in aqueous solutions

Authors
Kopylovich, MN Iponova, NA Baev, AK Kirillov, AM
Citation
Mn. Kopylovich et al., The kinetics of the formation of polynuclear hydroxo complexes of iron(III), chromium(III), and scandium(III) in aqueous solutions, RUSS J PH C, 74(10), 2000, pp. 1607-1610
Citations number
11
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY
ISSN journal
00360244 → ACNP
Volume
74
Issue
10
Year of publication
2000
Pages
1607 - 1610
Database
ISI
SICI code
0036-0244(200010)74:10<1607:TKOTFO>2.0.ZU;2-P
Abstract
The kinetics and the mechanism of formation of polynuclear hydroxo complexe s in the Fe3+-NO3--H2O, Cr3+-NO3--H2O, Sc3+-NO3--H2O, Fe3+-Cr3+-NO3--H2O, a nd Fe3+Sc3+-NO3--H2O systems were studied at various [OH-]/[Mn+] ratios. Th e activation energies of formation of polynuclear hydroxo complexes were de termined; at low [OH-]/[Mn+] values, the formation of hydroxo complexes was shown to be more favorable. In the Fe3+-M3+-NO3--H2O systems, the predomin ant process at the studied [OH-]/[Mn+] ratios was hydrolysis of Fe3+.