Abstract The experiments on the bleaching of sulfur dioxide and the dehydrating property of concentrated sulfuric acid are carried out in open containers, which can easily cause the escape of sulfur dioxide and cause environmental pollution. By reconstructing the main text of the textbook and the necessary experiments for students, the self-made H-shaped double test tubes were cleverly utilized to improve the bleaching properties of sulfur dioxide, the acidity, oxidation, reduction properties of aqueous solutions, and the dehydration and strong oxidation properties of concentrated sulfuric acid. The improved experiment has strong operability and obvious phenomena, which can achieve the greening, miniaturization, and integration of the experiment.
ZHAO Yan-Jun, ZHAO Yan-Hui. Improvement of SO2 and Concentrated H2SO4 Series Experiments Using H-Shaped Double Test Tubes[J]. Chinese Journal of Chemical Education, 2024, 45(7): 111-114.
