Kinetics and Mechanism of the Reaction between Chromium(III) and 2,3-Dihydroxybenzoic Acid in Weak Acidic Aqueous Solutions

Figure 3

UV-Vis spectra of Cr(III)/2,3-DHBA mixture at various times after mixing. Conditions: [Cr(III)]₀ = 0.036 M, [2,3-DHBA]₀= 0.011 M, and 𝑇=296 K. Spectrophotometric cell path 𝑑=1 cm. –■– 0:00 hours –– 1:00 hour, –▲– 2:00 hours, –▾– 3:00 hours, –♦– 4:00 hours, –◂– 5:00 hours, –▸– 29:00 hours, –– a few days.