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30 October, 04:23

How much water should be added to 10 mL of 8 % alcohol solution to reduce the concentration to 5 %?

We should add ___ mL.

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  1. 30 October, 04:37
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    My answer is 6ml, we can assume that we added in Xml water, and the alcohol is unchanged, so we can get the equation: 0.8 / (10+X) = 5%, than we can get the X=6ml.
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