Question 949534: Is it possible to mix a 10% acid solution and a 40% acid solution to obtain a 60% acid solution? Why or why not? Answer by Alan3354(69443) (Show Source):
You can put this solution on YOUR website! No, it's not possible.
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Adding 10% acid to the 40% can only reduce the concentration.
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The % of any mix of the 2 will give 10% <= C <= 40%