SOLUTION: Pure acid is to be added to a 5% acid solution to obtain 95L of 30% solution. What amounts of each should be used? How many Liters of 100% acid should be used to obtain the solut

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Question 505669: Pure acid is to be added to a 5% acid solution to obtain 95L of 30% solution. What amounts of each should be used?
How many Liters of 100% acid should be used to obtain the solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Pure acid is to be added to a 5% acid solution to obtain 95L of 30% solution. What amounts of each should be used?
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Equation:
acid + acid = acid
0.05x + 1.0(95-x) = 0.30*95
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Multiply thr by 100 to get:
5x + 100*95 - 100x = 30*95
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-95x = -70*95
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x = 70L (amt of 5% solution needed)
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95-x = 25L (amt of 100% solution needed)
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Cheers,
Stan H.
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How many Liters of 100% acid should be used to obtain the solution?
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