河沙具有熔点高、热储备量大的特点,又是非氧化还原的惰性物质,在许多化学实验里如果充分利用河沙的这种性质特点,可使很多实验获得最佳的实验效果。1.加热分解KClO_3制O_2把河沙眼KClO_3晶体按估计堆量2∶1分别研细混匀,放入试管中加热,具有相当适宜的热分解速度,可以集得近乎 Hesha has the characteristics of high melting point and large heat storage, and is also a non-redox inert material. In many chemical experiments, if we take full advantage of this nature of river sand, many experiments can obtain the best experimental results. 1. Decompose KClO_3 to O_2 to make the trachoma KClO_3 crystals mixed according to the estimated amount of 2:1, and heat them in a test tube. This has a very suitable thermal decomposition rate, and can be collected very closely.