<PRE><B>Question 370172</B>
How much of 30% HCl and 45% HCl would be needed 
to mix and produce 50 liters of 35% HCl?
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Equation:
HCL + HCL = HCL
0.30x + 0.45(50-x) = 0.35*50
Multiply thru by 100 to get:
30x + 45*50 - 45x = 35*50
-15x = -10*50
x = (2/3)50
x = 33 1/3 liters (amt. of 30% solution needed in the mixture)
50-x = 16 2/3 liters (amt. of 45% solution needed in the mixture)
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Cheers,
Stan H.
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