<PRE><B>Question 604902</B>
pure acid is to be added to a 10% acid solution to obtain 90L of 51% solution. what amounts of each should be used?

how many liters of 100% pure acid should be used to make the solution?

how many liters of the 10% solution should be used in the mixture?
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p + t = 90 (total solution)
1*p = 0.1*t = 0.51*90 (total acid)
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Can you finish it?
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PS  Always add the pure acid to the weaker solution, in case it splatters due to heat.  Never pour the water, or weaker solution, into strong acid.
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