为了用实验现象证明氯化镀复热后再冷却至常温时的变化属于先分解再化合的化学变化，而不是先升华再凝毕的物理变化，建议对氯化控的分解实验作如下改进。一、实验用品玻璃三通管两支，盲端单孔橡胶塞一个，乳胶管两段（每段约2cm），内填碱石灰粉末的玻璃棉一小团，沾有浓硫酸 In order to prove that the change of chloride plating after reheating and then cooling to normal temperature belongs to the chemical change of decomposition and recombination, instead of the physical change of sublimation and re-coagulation first, it is suggested to make the following improvement on the experiment of decomposition of chlorination control. First, the experimental supplies Two glass tee, blind end of a single hole rubber stopper, latex tube two (each about 2cm), filled with soda lime powder glass wool a small group, stained with concentrated sulfuric acid