中学化学用焰色反应的方法来鉴别K~+,Na~+,Ca~(2+),Ba~(2+)等离子,操作的方法是:用铂丝(或钨丝、无锈铁丝)分别蘸 K_2 CO_3,Na_2 CO_3……溶液,在酒精灯火焰上灼烧。用这样的方法去实验,有两个缺点,①酒精灯火焰温度只有500℃左右,激发 Ca~(2+),看不出现象,同时酒精灯火焰显黄色,对 Na~+,K~+ 焰色有干扰作用。为了克服以上缺 High school chemical flame reaction method to identify K ~ +, Na ~ +, Ca ~ (2+), Ba ~ (2+) plasma, the operation method is: using platinum wire (or tungsten wire, stainless steel wire) Respectively K 2 CO 3, Na 2 CO 3, ... solution, burning on the flame of the alcohol lamp. To use this method to experiment, there are two disadvantages: 1 The flame temperature of the alcohol lamp is only about 500°C, which stimulates Ca 2+ , which is not visible. At the same time, the flame of the alcohol lamp is yellow, and for Na~+, K~+ Flame color interferes. To overcome the above