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怎样区分羊毛和棉花

更新时间: 2020-07-06 00:00:00     

棉花的主要成分是纤维素,燃烧时有烧纸的气味,燃烧很快,会产生黄色火焰,灰烬是极细的粉末,棉花受酸溶液的影响会变脆,而受碱溶液的影响会稍微膨胀;羊毛的主要成分是蛋白质,羊毛燃烧时有烧焦羽毛的气味,燃烧后灰烬较多,会变成带有光泽的硬块,用手指一压就会变成粉末,羊毛受酸溶液的影响几乎无变化,受碱溶液的影响会变脆。

关键词: 怎样 区分 羊毛 棉花

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