15问答网 > 含盐百分之八的盐水50千克。要得到百分之十的盐水，需要蒸发掉多少千克水

含盐百分之八的盐水50千克。要得到百分之十的盐水，需要蒸发掉多少千克水

2025-03-31 09:06:17
推荐回答（3个）
回答1：

溶质质量50*8%=4千克
变成10%，只蒸发溶剂（水），溶质质量不变
所以蒸发后溶液质量=4/10%=40千克
50-40=10千克
需要蒸发掉10千克水

回答2：

盐=50×8%=4千克

10%的盐水=4÷10%=40千克

蒸发=50-40=10千克

回答3：

10kg
0.08*50=4
4/0.1=40
50-40=10

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