The kinetics of the reaction between magnesium and EBT

Ruth Koren, Berta Perlmutter‐Hayman, Ruth Shinar

Research output: Contribution to journalArticlepeer-review

Abstract

The kinetics of the reaction between Mg2+ and Eriochrome‐Black‐T (EBT) has been investigated in the pH range between 7.05 and 9.0, in the presence of 12% ethanol. The reaction is found to consist of two parallel paths, one involving the tervalent unprotonated ligand, and one its monoprotonated form. The rate constant for the unprotonated ligand has a “normal” value, whereas that for the protonated form is much lower. The numerical value of the rate constant for the unprotonated ligand obtained from results at a magnesium concentration of 10−3M and a pH up to 9.0 is, however, inconsistent with that obtained from results at [Mg2+] = (1 to 4) × 10−3M and pH up to 8.1. This can be explained, at least partially, if we assume the intermediate MgHD to lose its proton not only to H2O, but also to other bases present in the solution.

Original languageEnglish
Pages (from-to)39-50
Number of pages12
JournalInternational Journal of Chemical Kinetics
Volume6
Issue number1
DOIs
StatePublished - Jan 1974
Externally publishedYes

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