过氧化氢碘化钾催化分解反应中的新现象

New phenomenon in a classic system-hydrogen peroxide decompositioncatalyzed by potassium iodide

深入研究了“过氧化氢碘化钾催化分解”反应.我们观察到,随着反应的进行,该反应体系的颜色变黄、碘离子浓度降低、电导率增大、pH值升高、温度上升、生成了单质碘.同时,还有振荡现象.在相关文献中,未见到对这些现象的描述.

An abnormal phenomenon was discovered by accident in a classic reaction system-hydrogen peroxide decomposition catalyzed by potassium iodide. To understand it better, we studied the reaction systematically. Instruments such as pH meter, conductometer, iodic ion-selective-electrode as well as digital thermometer were employed to detect the change of pH, conductivity, concentration of iodic ion and temperature during the reaction. A series of new phenomena such as the conductivity and pH of the solution increased obviously, the concentration of iodic ion decreased remarkably and so on, were observed in succession unexpectedly. These are the phenomena that can not be explained by the all-known mechanism and have not been expressed by other correlative documents.