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Determination of equilibrium constants for a number of metal-phosphate complexes

✍ Scribed by J. A. Wolhoff; J. Th. G. Overbeek

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
984 KB
Volume
78
Category
Article
ISSN
0165-0513

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✦ Synopsis

Abstract

Many metal ions form soluble complexes with pyro‐ and tripolyphosphate. Complex formation entails a decrease in pH. By measuring the pH and in some cases the concentration of free metal ions, equilibrium constants for a number of metal‐phosphate complexes were determined at 25Β° and at 40Β°. Activity corrections were applied. The tendency to form complexes increases in the following order:
Tripolyphosphate has somewhat stronger complexing properties than pyrophosphate. The influence of the temperature is in most cases small. Constants obtained are listed in Table V.

πŸ“œ SIMILAR VOLUMES

Determination of stability constants of
Determination of stability constants of metal complexes with potentiometric pH titrations
✍ G. Anderegg πŸ“‚ Article πŸ“… 1993 πŸ› Elsevier Science 🌐 English βš– 402 KB

The use of different cells for pH measurements for the determination of equilibrium constants of metal complexes is discussed in relation to the liquid junction potential connected with them. The effects of Hf and OH, on this quantity are also considered. The literature values for the conversion fac