PDF

Solubility-product constant and thermodynamic properties for synthetic otavite, CdC03(,), and aqueous association constants for the Cd( II)-C02-Hz0 system

SUSAN L. S. STIPP, GEORGE A. PARKS

1993enthermodynamicscadmiumsolubilitychemicalconstants

Abstract

Language:

Considerable disparity exists in the published thermodynamic data for selected species in the Cd(II)-CO2-H2O system near 25°C and 1 atm pressure. The objective of this study was to evaluate published experimental and estimated data for aqueous cadmium-carbonate species. We suggest an association constant, pK, of -3.0 ± 0.4 for CdCO3, about -1.5 for CdHCO3, and -6.4 ± 0.1 for Cd(CO3)2- (T = 298.15 K, P = 1 atm; I = 0). We examined all available data for cadmium-hydrolysis species and confirmed that the consistent set of constants presented by Baes and Mesmer is the best available. The solubility of synthetic otavite, CdCO3(,), has been measured in KClO4 solutions where I = 0.1 M. We calculated pKSp = 12.1 ± 0.1 (T = 25.0°C; P = 1 atm; I = 0) from measured concentrations of Cd2+, measured PCO2, and pH, alongside our selected set of equilibrium constants and activity corrections estimated using the Davies equation. Additionally, we recommended a new set of thermodynamic properties for otavite based on new solubility data.

Download

Cite This Work

@article{8eacdb1a-9014-499b-b32e-e317c6f383d0,
  title={Solubility-product constant and thermodynamic properties for synthetic otavite, CdC03(,), and aqueous association constants for the Cd( II)-C02-Hz0 system},
  author={SUSAN L. S. STIPP and GEORGE A. PARKS},
  year={1993},
  language={en}
}
TY  - JOUR
TI  - Solubility-product constant and thermodynamic properties for synthetic otavite, CdC03(,), and aqueous association constants for the Cd( II)-C02-Hz0 system
AU  - SUSAN L. S. STIPP
AU  - GEORGE A. PARKS
PY  - 1993
LA  - en
ER  -

Similar Items

Chemical Metallurgy: Principles and Practice

Chiranjib Kumar Gupta

This book provides a comprehensive overview of the field of chemical metallurgy, addressing both common and less common metals. The objective of the v

2003enPDF

Extractive Metallurgy 1

Alain Vignes

This book provides a comprehensive overview of the fundamental principles of extractive metallurgy, with a specific focus on basic thermodynamics and

2011enPDF

The Effect of B203 on the Solubility of (PS~LUC~),(F~G~),O,~ Garnet in PbO-B,O, Flux

K. NITSCH, J. BOK

Die vorliegetide Arbeit behandelt die Loslichkeit von Granat (YSinLuCa),(FeGe),O,, im Schinelziiiittel PbO-B2O3. Es wird ein Anionenmodell vorgeschlag

1979dePDF

Comparative study for leaching processes of uranium, copper and cadmium from gibbsite ore material of Talet Seleim, Southwestern, Sinai, Egypt

Walaa A. Kassab

In this paper, leaching characteristics are presented, and a cost-effective process for extracting uranium, copper, and cadmium from Talet Seleim’s Gi

2022enPDF

Optimization of Integrated Steel Plant R

This paper addresses the challenge of assessing the feasibility of wind power plant projects at sites with insufficient or no local historic wind data

2025enPDF

Design for Recovery of Precious and Base

2026enPDF