脱脂棉在化学实验中,可用的地方很多,现按其作用分别举例介绍如下: 一、载体将蘸有淀粉碘化钾试液(或溴化钠溶液)的棉球,用镊子夹住,伸入盛氯气的瓶中片刻,随即取出棉球,就可看到白色棉球已转变成蓝色(或红棕色)。这个实验操作,可用作判断卤素的活泼性。 Absorbent cotton in chemical experiments, there are many available, are now examples of their role, respectively, as follows: First, the carrier will be dipped in starch potassium iodide solution (or sodium bromide solution) of the cotton ball, with tweezers grip, Bottle for a moment, then remove the cotton ball, you can see the white cotton ball has been transformed into blue (or reddish brown). This experimental operation, can be used to determine the liveliness of the halogen.