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在做过滤的实验中要注意哪几点

更新时间: 2020-10-05 00:00:00     

一贴:滤纸贴漏斗,加快过滤速率;

二低:滤纸低于液面、液面低于滤纸边缘,防止液体从漏斗与滤纸的间隙中流出;

三靠:烧杯口紧靠玻璃棒,使液体沿玻璃棒进入过滤器,防止外洒;玻璃棒末端靠三层滤纸处,防止滤纸破损;漏斗下端口靠烧杯内壁,防止液体飞溅。

关键词: 过滤 实验 注意

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