Conducting a Low-Waste Iodine Clock Experiment on Filter Paper To Discern the Rate Law,Journal of Chemical Education

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Conducting a Low-Waste Iodine Clock Experiment on Filter Paper To Discern the Rate Law
Journal of Chemical Education ( IF 2.5 ) Pub Date : 2018-12-04 00:00:00 , DOI: 10.1021/acs.jchemed.8b00458
Luis A. Barrera ₁ , Alma C. Escobosa ₁ , Laila S. Alsaihati ₁ , Juan C. Noveron ₁

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Herein we present a modified iodine clock experiment which replaces starch with cellulose paper. This provides the reaction with a white solid surface in which color change can be clearly observed and reduces reagent amounts required to 540 μL per group. After data acquisition, students are required to calculate reaction orders and the reaction constant k, culminating in their ability to discern the rate equation for this reaction. This experiment is ideal for teaching kinetics in high school and undergraduate settings, particularly if liquid waste disposal is not readily available or if high importance is placed upon minimizing their environmental impact.

中文翻译：

在滤纸上进行低废物碘钟实验以判别速率定律

在这里，我们提出了一种改进的碘钟实验，该实验用纤维素纸代替了淀粉。这为反应提供了白色固体表面，可以清晰地观察到颜色变化，并将所需的试剂量减少到每组540μL。采集数据后，要求学生计算反应阶数和反应常数k，从而最终确定该反应的速率方程式。此实验非常适合在高中和大学环境中教授动力学，特别是在液体废物处理不易获得或对降低环境影响极为重视的情况下。

更新日期：2018-12-04

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