The kinetics and mechanism of the oxidation of formic acid by bromine in acid aqueous media

Abstract

The reaction between formic acid and bromine in strongly acid aqueous media at 298 K Brz + HCOOH -2 Br-+ 2 H+ + COz was studied by absorption spectrophotometry (A = 447 nm). Reaction rates, expressed as

A kinetic study of the reaction between formic acid and HoBr

“…We turn now to experimental results (Table I) that k3 values agree well witAA those obtained in a previous study of the reaction Bra + HCOO- [9]. Next, by iterative least-squares adjustment of absorbance versus time data by means of eq.…”

Sono-oxidative desulfurization of fuels using heterogeneous and homogeneous catalysts: A comprehensive review

“…Moreover, formic acid can react with the resulting Br 2 according to the following reaction [222] , [223] (14), thus causing formic acid concentration to decrease. …”

A Student Experiment in Non-Isothermal Chemical Kinetics

“…The oxidation of formic acid by bromine is represented by eq 1. HCOOH(aq) + Br 2 (aq) → CO 2 (g) + 2H + (aq) + 2Br ᎑ (aq) (1) The reaction is believed to proceed by the following mechanism (20,21):…”

“…where K a is the acidity constant for the dissociation of formic acid (reaction 2) and γ, γ + , and γ ᎑ are the activity coefficients of HCOOH, H + , and HCOO ᎑ , respectively. The kinetics of the reaction can be followed spectrophotometrically at 400 nm by monitoring the decrease in the concentration of Br 2 as a function of time (20). Since the rate of the reaction is dependent on the hydrogen ion activity (21) as indicated in eq 4, it can be controlled by the addition of HClO 4 to the reaction mixture.…”