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58问答库 > 欲配制250ml 生理盐水,问应取固体氯化钠多少克?写出详细的操作步骤

欲配制250ml 生理盐水,问应取固体氯化钠多少克?写出详细的操作步骤

2025-03-14 21:28:33

推荐回答（3个）

回答（1）：

生理盐水的密度是1.03，生理盐水的浓度是0.9%
欲配制250ml 生理盐水应取固体氯化钠为 1.03×250×0.9%= 2.316g
操作方法：称取2.316g固体氯化钠，加20毫升水溶解后，再加230毫升水，混匀即可。

回答（2）：

生理盐水浓度是0.9%，250*0.9%=2.25g,称2.25g氯化钠溶于水中，然后定容到250ml

回答（3）：

欲配制250ml 生理盐水,问应取固体氯化钠12.5克
生理盐水浓度5%，250*5%=12.5

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