论文部分内容阅读
一观反应进行有“三度”1.浓度:实验室制取氯气需用浓盐酸和二氧化锰反应,因为HCl的还原性比较弱,若盐酸的浓度较小,反应速率过慢甚至反应不能发生. 2.温度:常温下二氧化锰与浓盐酸的反应很慢,为了快速制取氯气,需要对反应混合物加热.但考虑到浓盐酸的挥发性,温度过高会使
There is a “triple degree” in the first observation reaction. 1. Concentration of chlorine in the laboratory requires reaction with concentrated hydrochloric acid and manganese dioxide, because the reducibility of HCl is relatively weak, if the concentration of hydrochloric acid is small, the reaction rate is too slow or even the reaction cannot Occurs. 2. Temperature: The reaction between manganese dioxide and concentrated hydrochloric acid is very slow at room temperature. In order to quickly produce chlorine gas, the reaction mixture needs to be heated. However, taking into account the volatility of concentrated hydrochloric acid, the temperature is too high.