用高锰酸钾制取氧气会在试管壁上留下褐色物质,其它接触过高锰酸钾的仪器,以及手上、衣服上都会留有褐色斑点,这种褐色物质的化学成分是二氧化锰,用一般的洗涤剂很难将它洗去。二氧化锰具有一定的氧化性,这种氧化性随着反应液中的氢离子浓度的增大而增强。所以在酸性溶液中,二氧化锰很容易 Oxygen production from potassium permanganate will leave brown material on the wall of the tube. Other instruments that contact the potassium permanganate, as well as brown spots on the hands and clothes, have a chemical composition of the brown material. Manganese oxide, it is difficult to wash it off with ordinary detergents. Manganese dioxide has a certain degree of oxidizability, and this oxidizability increases as the concentration of hydrogen ions in the reaction liquid increases. So in acidic solution, manganese dioxide is very easy