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如何配制0.9氯化钠溶液100毫升

现有95%乙醇，如何配制75%乙醇

2025-04-06 10:17:17

推荐回答（2个）

回答1：

95%×100=75%×X 解得X为126.67，即75%的溶液质量 126.67-100=26.67 再加26.67的水即可配成75%的溶液补充：你是问氯化钠还是乙醇啊？

回答2：

0.9氯化钠?单位是什么？追问： 0.9克回答：那你就取0.9克的氯化钠溶于91毫升的水
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