Abstract
In the pH range 1.3-5.0, chlorine(III) and permanganate react rapidly, yielding mixtures of products and unexpended reactants that are stable for approximately 10 s to 1 min, before the further occurrence of slower reactions leading to higher chlorine oxidation states. At 25.0 ± 0.5 °C and ionic strength 1.0 M (NaC104), the spectrophotometrically determined stoichiometry of this initial reaction is Mn04" + 5C102" (or 5HC102) + 8H+ (or 3H+) = Mn2+ + 5C1G2 + 4H20. Under the same conditions the rate law is 1/5d[C102]/di = -d[Mn04"]/d< = fcapp[Mn04'][Cl(III)]. It was found that the [H+] dependence of the pseudo-first-order rate constant k = fcapp[Cl(III)] is given by k = (a + Z>[H+])/(l + c[H+]).