SOLUTION: How much pure hydrochloric acid should be added to 5 liters of a 40% solution to produce a 75% solution?

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Question 1129776: How much pure hydrochloric acid should be added to 5 liters of a 40% solution to produce a 75% solution?
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
Highly faulty physical chemistry question. There is no pure hydrochloric acid solution. Seventy-five percent hydrochloric acid solution?

Look, for example, in the Physical Properties section of https://en.wikipedia.org/wiki/Hydrochloric_acid