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使氯酸钾分解制取氧气,除了用二氧化锰作为催化剂之外,还有氧化铁(Fe_2O_3)、氧化铬(Cr_2O_3)和氧化铜(CuO)等都可以使用。除此之外,作者还用褐色的河砂和家用的食盐进行过实验。下面是一些实验的结果:先用纯净的氯酸钾实验,把氯酸钾2克盛在试管里,用三芯酒精灯加热,用排水集气法收集气体,经过2分39秒才集得50毫升的氧气。用同样方法把2克氯酸钾和1克二氧化锰的混合物加热,只需43秒就可以取得50毫升氧气。用2克褐色河砂代替二氧化锰进行实验,51秒可取得50毫升氧气。但河砂并不是一种纯净物质,除了二氧化硅外,其中含有铁的化合物。如果把2克氯酸钾和1克氧化铁的混合物用同法试验,
The decomposition of potassium chlorate to produce oxygen, in addition to manganese dioxide as a catalyst, as well as iron oxide (Fe 2 O 3), chromium oxide (Cr 2 O 3) and copper oxide (CuO) can be used. In addition, the author experimented with brown river sand and household salt. The following is the result of some experiments: first with pure potassium chlorate experiment, the potassium chlorate 2 g in the test tube, with a three-core alcohol lamp heating, drainage gas collection method to collect the gas, after 2 minutes and 39 seconds was collected 50 ml of oxygen . In the same way, a mixture of 2g of potassium chlorate and 1g of manganese dioxide was heated to obtain 50ml of oxygen in only 43 seconds. Experiments were performed using 2 grams of brown river sand instead of manganese dioxide and 50 ml of oxygen was obtained in 51 seconds. River sand is not a pure substance, except for silica, which contains iron compounds. If 2 grams of potassium chlorate and 1 gram of iron oxide mixture with the same test,