Question 985224: How many gallons of hydrochloric acid must be added to 12 gallons of a 30% solution to obtain a 40% solution?
Answer by josgarithmetic(39621)   (Show Source):
You can put this solution on YOUR website! This response is picky, but do you have percent as mass per mass, or as mass per volume? Do you need the densities of the solutions? Unless you know you are dealing with volume per volume, which is doubtful for HCl solutions, the question will require knowing the densities.
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