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pH试纸如何制作

更新时间: 2020-07-10 00:00:00     

用卷心菜做PH试纸:

一、撕一些卷心菜小片,放在微波炉中微波3到5分钟;

二、用纸巾在微波了的卷心菜上按,把纸巾给“染色”了;

三、把纸巾晾干,剪成细条,PH试纸就做成了;

四、测试。绿色的表示被测试的物质是碱性的,粉红色表示被测试的物质是酸性的。

关键词: ph 试纸 如何 制作

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