在水里放些糖或盐,制成糖水或盐水.糖水、盐水的凝固点和纯水一样吗?请设计实验来寻找答案.
题目
在水里放些糖或盐,制成糖水或盐水.糖水、盐水的凝固点和纯水一样吗?请设计实验来寻找答案.
答案
答:(1)取三个小塑料杯分别装入质量相同的纯水、盐水和糖水,然后把它们放入冰箱中冷冻.
(2)等它们都结成冰后,取出来分别将它们敲碎,再放入三个小烧杯中.
(3)用温度计分别测出它们熔化过程中各个时刻的温度.
(4)从实验数据中可得出纯水、盐水和糖水的各自熔点,就可得出结论.
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