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下雪天为什么要撒盐
更新时间: 2021-01-23 19:26:35  

1、下雪天之所以要撒盐,其主要的作用就是为了让雪不结冰。

2、盐溶于雪水之后会生产氯化钾溶液,里面的钾离子和氯离子能破坏水的结晶网状结构,使水不能结冰,且盐水的凝固点比雪低,撒上盐之后雪周围的水就会变成盐水,难以凝固。

关键词: 下雪天 为什么

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