Abstract
The kinetics of reaction between [Fe(CN)5OH]3− and CN− have been investigated spectrophotometrically at pH=11.00, I=0.25 M(NaClO4) and temp.=25.0°C by disappearance of the absorption peak at 395 nm. The rate data for this reaction followed first order kinetics in both [Fe(CN)5OH3−] and [CN−]. The second order rate constant (kf) was found to be (3.44±0.08)×10−3 M−1 s−1. The pH dependence of the reaction was also investigated in the range 9–12. The activation parameters were found to be ΔH†=36.4kJ mol−1 and ΔS†=−168JK−1 mol−1.
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