SOLUTION: How much of 30% HCl and 45% HCl would be needed to mix and produce 50 liters of 35% HCl?

Question 370172: How much of 30% HCl and 45% HCl would be needed to mix and produce 50 liters of 35% HCl?

Found 2 solutions by Fombitz, stanbon:
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
Let A be the amount of 30% HCl, B the amount of 45% HCl.
1.
.
.

2.
Multiply eq. 1 by (-6) and add to eq. 2,

liters
Then from eq. 1,

liters

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
How much of 30% HCl and 45% HCl would be needed
to mix and produce 50 liters of 35% HCl?
---------------
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)
=============
Cheers,
Stan H.
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