Resumen de Wash Bottle Laboratory Exercises:: Iodide-Catalyzed H2O2 Decomposition Reaction Kinetics Using the Initial Rate Approach

Rebecca Barlag, Frazier Nyasulu

• A wash bottle water displacement scheme is used to determine the kinetics of the iodide-catalyzed H2O2 decomposition reaction. The reagents (total volume 5.00 mL) are added to a test tube that is placed in a wash bottle containing water. The mass of the water displaced in ∼60 s is measured. The reaction is first order in H2O2 and first order in I−. The average rate constant reported by students is 0.0112 ± 0.0002 M−1 s−1 (N = 17) at ∼20 °C.