SOLUTION: Solution A is 25% acid and solution B is 40% acid. How much of each solution is needed to make 100 liters of 30% acid?

Question 277812: Solution A is 25% acid and solution B is 40% acid. How much of each solution is needed to make 100 liters of 30% acid?

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Solution A is 25% acid and solution B is 40% acid. How much of each solution is needed to make 100 liters of 30% acid?
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One variable solution:
0.25x + 0.40(100-x) = 0.30*100
Multiply thru by 100 to get:
25x + 40*100 - 40x = 30*100
-15x = -10*100
x = (2/3)100
x = 66.67 liters (amt of 25% solution needed in the mixture)
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100-x = 33.3 liters (amt of 40% solution needed in the mixture)
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Cheers,
Stan H.

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