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如何检验电解食盐水产物

更新时间: 2020-09-24 00:00:00     

检验电解食盐水产物的方法:

1、分别收集正负两极生成的气体;

2、负极的气体可以燃烧,发出淡蓝色火焰,干燥的烧杯有水珠生成,且倒入澄清石灰水不变浑浊,证明是氢气;

3、正极的气体是黄绿色,有刺激性气味,是氯气;

4、向溶液中倒入酚酞试液,溶液变红,由碱性物质生成,是氢氧化钠。

关键词: 如何 检验 电解 食盐 产物

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