SOLUTION: I have 65 gallons of H2O, 35 gallons of 9% sulfuric acid. How much of the sulfuric mix do I have to add to the H2O to get a 0.26% concentration

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Question 942816: I have 65 gallons of H2O, 35 gallons of 9% sulfuric acid.
How much of the sulfuric mix do I have to add to the H2O to get a 0.26% concentration
Found 2 solutions by Alan3354, stanbon:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I have 65 gallons of H2O, 35 gallons of 9% sulfuric acid.
How much of the sulfuric mix do I have to add to the H2O to get a 0.26% concentration
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Add S gallons.
65*0 + S*9 = (65 + S)*0.26
9S = 0.26S + 16.9
1.9336 gallons

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
I have 65 gallons of H2O, 35 gallons of 9% sulfuric acid.
How much of the sulfuric mix do I have to add to the H2O to get a 0.26% concentration
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Equation:
acid + acid = acid
0.09x + 0*65 = 0.0026(x+65)
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Multiply thru by 10,000 to get:
900x = 26x + 26*65
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874x = 26*65
x = 1.934 gallons (amt of 9% to add)
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Cheers,
Stan H.
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