85问答库 > 常温下，糖水和食盐水浓度相同时,哪个渗透压大，为什么？

常温下，糖水和食盐水浓度相同时,哪个渗透压大，为什么？

2025-04-03 03:31:37
推荐回答（1个）
回答1：

不同的，渗透压要看溶质粒子的浓度，π=cRT R、T都是相同的。 1个NaCl含有1个Na 和1个Cl-，NaCl的c是NaCl浓度的2倍。 葡萄糖不电离 稀溶液的质量浓度=物质的量浓度 所以食盐水溶液的渗透压大，约是葡萄糖的2倍。

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