Complexation and precipitation equilibria in the system NiII–CrVI–H2O
- 1 January 1994
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions
- Vol. 90 (9) , 1227-1231
- https://doi.org/10.1039/ft9949001227
Abstract
A potentiometric and spectrophotometric study of the complexation equilibria between CrVII and NiII has been performed. Formation of the soluble NiCrO4 complex has been found and the thermodynamic formation constant has been calculated (log β° 11= 2.40 ± 0.03), as well as its molar absorptivity values at the different wavelengths studied. The precipitation equilibria in the system NiII–CrVI–H2O have also been investigated. A mixed precipitate, NiCrO4· 3Ni(OH)2, has been found and its thermodynamic solubility constant has been determined (log K° so=–51.1 ± 0.2).Keywords
This publication has 7 references indexed in Scilit:
- Potentiometric and spectrophotometric study of the acid-base equilibria of Cr(VI) at 25°C and different ionic strengths of aqueous KNO3Journal of Solution Chemistry, 1993
- Conductometric Determination of Ion-association Constants for Magnesium and Nickel Sulfates in Aqueous Solutions at Various Temperatures between 0°C and 45°CBulletin of the Chemical Society of Japan, 1973
- Interactions of divalent metal ions with inorganic and nucleotide phosphates. I. ThermodynamicsJournal of the American Chemical Society, 1972
- Association of chromium(VI) with neptunium(IV) and thorium(IV) in perchlorate solutionJournal of the American Chemical Society, 1972
- Kinetic studies on the 1:1 complex of iron(III) and chromate ions in perchloric acid solutionInorganic Chemistry, 1969
- Absorption of Carbon Dioxide by Solutions of 2 - Amino - 2 - (hydroxymethyl) - 1,3 - propanediolAnalytical Chemistry, 1961
- The Solubility Product of Barium Chromate at Various Ionic StrengthsJournal of the American Chemical Society, 1943