改进实验目的过氧化氢制取氧气是中学化学实验的重点之一。为了充分说明二氧化锰的催化作用,并且更方便的验证催化剂在化学反应前后质量和化学性质不改变,更方便的制取和收集氧气,我对课本的实验装置和操作进行了如下改进。实验仪器及试剂烧杯、漏斗、滤纸、细线、天平、小烧杯、橡胶管, Improvement of experimental purpose Hydrogen peroxide is one of the focuses of chemical experiments in high school. In order to fully illustrate the catalysis of manganese dioxide, and more convenient verification of the catalyst before and after the chemical reaction does not change the quality and chemical properties, more convenient preparation and collection of oxygen, I textbook experimental devices and operations were improved as follows. Experimental equipment and reagents Beakers, funnels, filter paper, thin lines, scales, small beakers, rubber tubes,