天气预报 > 其他 > 鉴别新制氯水和久置氯水3种
鉴别新制氯水和久置氯水3种
更新时间: 2020-08-17 00:00:00  

1、加石蕊试液,看是否变红后退色,退色的是新的。

2、看颜色,黄绿色的是新的。

3、进行光照,看是否有气体生成,有气体的是新的。

关键词: 鉴别

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