<PRE><B>Question 248059</B>
2 solutions of h2so4. one is 40% concentration and one is 25% concentration. how much of each do I need to get 137 liters of 36% solution?
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acid + acid = acid
0.40x + 0.25(137-x) = 0.36*137
Multiply thru by 100 to get:
40x + 25*137 - 25x = 36*137
15x = 11*137
x = 100.47 liters (amt. of 40% solution needed in the mixture)
137-100.47 = 36.53 liters (amt of 25% solution in the mixture)
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Cheers,
Stan H.</PRE>