Mathematics – Logic
Scientific paper
May 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.1253t&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 55, Issue 5, pp.1253-1264
Mathematics
Logic
2
Scientific paper
Spectroscopic measurements of palladium(II) chloride solutions have been performed under ambient to elevated temperature conditions with systematic changes in pH and [Cl -1 ]. Spectral signatures from electronic absorption spectra (Uv/Vis) and Raman vibrational spectra were determined, and these were subsequently used to systematically map out species along several paths of the predominance diagram. The species PdCl x ( H 2 O ) 4- x 2- x ( x = 2, 3, or 4) and Pd(OH) 2 were observed, along with a precipitation product formed from > 10 M [Pd 2+ ]solutions under near-neutral conditions. The elemental composition of the precipitation product was examined with a scanning electron micrograph (SEM) and was found to contain chloride as well as palladium. While sub-stoichiometric amounts of available OH - ligand produced UV/ Vis solution spectra likely to be from mixed Pd-Cl-OH species, the pH field of these species would be vanishingly small at low, geologically relevant palladium ion concentrations where [OH - ]is no longer the limiting reagent in the transformation. In mildly acidic media, where chloropalladium(II) species predominate, elevated temperatures (up to 90°C) cause lower charged palladium-chloride species to be favored, consistent with the lowered dielectric constant of water at higher temperatures.
Janecky David R.
Rogers Pamela S. Z.
Tait Drew C.
No associations
LandOfFree
Speciation of aqueous palladium(II) chloride solutions using optical spectroscopies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Speciation of aqueous palladium(II) chloride solutions using optical spectroscopies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speciation of aqueous palladium(II) chloride solutions using optical spectroscopies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1037525