Evaluation of the stability constant of Cl₂˙^–in neutral aqueous solution

Abstract

The stability constant (K,) of C12*has been measured in neutral aqueous solution using pulse radiolysis to generate CI' by reaction of S O , 'with CI-. K , is found to be (4.7 & 0.4) x lo3 dm3 mol-', compared with the literature value of 1.9 x lo5 dm3 mot-'. This low value of K , makes it possible to measure the rates of reaction of C1' using pulse radiolysis. The technique is exemplified for the reaction CI' + HC0,for which k = (1.3 & 0.4) x lo8 dm3 mol-' s-' has been obtained.

Reactions of Cl•/Cl2•− Radicals with the Nanoparticle Silica Surface and with Humic Acids: Model Reactions for the Aqueous Phase Chemistry of the Atmosphere

“…Time‐resolved experiments with 0.1 M > [Cl − ] >5 × 10 −4 M and [S 2 O 8 2− ] = 5 × 10 −3 M show a transient species with an absorption maximum at 340 nm, whose spectrum is in agreement with that reported for the Cl 2 •− radical ions (16), see Fig. 1 inset.…”

Chloride anion effect on the advanced oxidation processes of methidathion and dimethoate: Role of Cl2− radical

“…Time-resolved experiments with 0.6 M > [Cl À ] > 0.3 M and ½S 2 O 2À 8 ¼ 1.5 Â 10 À2 M performed with the conventional flashphotolysis apparatus show a transient species with an absorption maximum at 340 nm, whose spectrum is in agreement with that reported for the Cl À 2 radical ions (Adams et al, 1995). The concentration of Cl À 2 is expected to be much higher than that of Cl under our experimental conditions, as the equilibrium constant for the reversible reactions (3) and (4)(3) and (4) is K 3,4 ¼ 1.4 Â 10 5 M À1 at 298 K .…”

Temperature dependence of the rate constant for hydrogen atom reaction with Cl 2 −• in water by pulse radiolysis of aqueous HCl solution

“…•− molar absorption coefficient ε 340 ¼9600 M À 1 cm À 1 (Adams et al, 1995) was assumed for all temperatures. The kinetics of reaction (2) has been determined by measuring the decay of Cl 2 −• , in 0.1 M HCl solution irradiated with a 17 ns pulse of high-energy electrons from 6 MeV ELU-6 linear accelerator.…”