Fig. 10From: A study on the dissolution rates of K-Cr(VI)-jarosites: kinetic analysis and implicationsArrhenius plots for the determination of the activation energy. a Progressive conversion period, OH− medium; b induction period in OH− medium; c progressive conversion period, H3O+ medium; d induction period, H3O+ medium. The concentrations used for OH− medium were 0.05 and 0.01 mol L−1 NaOH; 0.5 and 0.3 mol L−1 HCl were used for H3O+mediumBack to article page