Other
Scientific paper
Nov 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001gecoa..65.4187m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 65, Issue 22, pp.4187-4199
Other
1
Scientific paper
The aim of this study was to gain insight into the aqueous chemistry of tin at elevated temperatures and pressures. For this purpose, the spectra of chloridotin(II) complexes in the ultraviolet region were measured in acid chloride solutions containing 1.00 × 10 -4 m tin, 1.00 × 10 -2 m HCl and varying NaCl concentrations up to 2.936 m from 25 to 300°C and at the equilibrium saturated vapor pressure of the system. The thermodynamic cumulative and stepwise formation constants of the individual tin(II) chloride species were calculated from the spectrophotometric data using a nonlinear least squares routine. At 25°C, a scheme including five species of SnCl n 2-n (0 n 4) best fitted the available data. At 300°C however, SnCl 2 0 and SnCl 3 - are the predominant species at total chloride concentrations >0.1 m. The presence of SnCl 4 2- in concentrated (up to 3 m) chloride solutions was not detected above 150°C. With increasing temperature, chloridotin(II) complex stability is characterized by quite large endothermic enthalpies and large positive entropies of formation. It was concluded that tin(II) chloride complexes could be important in the transport and deposition of tin by hydrothermal ore solutions of moderate to high salinity.
Müller Berndt
Seward Terry M.
No associations
LandOfFree
Spectrophotometric determination of the stability of tin(II) chloride complexes in aqueous solution up to 300°C 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 Spectrophotometric determination of the stability of tin(II) chloride complexes in aqueous solution up to 300°C, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spectrophotometric determination of the stability of tin(II) chloride complexes in aqueous solution up to 300°C will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1551881