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为什么用碘酒能鉴别面粉和奶粉
更新时间: 2020-09-19 00:00:00  

因为碘酒里含有碘,面粉里含有淀粉,而奶粉主要是蛋白质。

淀粉的分子结构式是环状的,碘酒中的碘可以插进去,使其结构发生变化,由白色变成蓝色。所以碘遇淀粉会变蓝,将碘酒分别滴入面粉和奶粉,变蓝的那个就是面粉。

关键词: 为什么 碘酒 鉴别 面粉 奶粉

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