Kinetics of the reaction of aluminum EDTA and cobalt(II) EDTA with calmagite
Document Type
Article
Publication Date
1-1-1984
Abstract
The reaction of aluminum EDTA with calmagite was found to be first-order in calmagite, half-order in aluminum EDTA, and zero-order in excess EDTA. The three-halves-order apparent rate constant at pH 9.48 and 20°C with ionic strength 0.30 was 0.232 ± 0.0141 1 2 · mol 1 2 · s-1. The activation energy was 3.2 ± 0.3 kcal/mol. The pH dependence was complex between 8 and 10. The mechanism proposed is a rapid dissociation of a dimer of aluminum EDTA to a monomer followed by a rate-determining displacement of the EDTA by calmagite. The reaction of Co(II) EDTA with calmagite was confirmed to be first-order in Co(II) EDTA and first-order in calmagite with an activation energy of 7.5 ± 0.6 kcal/mol. © 1984.
Publication Title
Polyhedron
Recommended Citation
Huffman, M.,
&
Luehrs, D.
(1984).
Kinetics of the reaction of aluminum EDTA and cobalt(II) EDTA with calmagite.
Polyhedron,
3(8), 917-920.
http://doi.org/10.1016/S0277-5387(00)84647-1
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/7470