SOLUTION: How many milliliters of a(n) 60% acid solution should we add to 300 milliliters of a(n) 90% acid solution to get a(n) 64.5% solution?

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Question 764969:
How many milliliters of a(n) 60% acid solution should we add to 300 milliliters of a(n) 90% acid solution to get a(n) 64.5% solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many milliliters of a(n) 60% acid solution should we add to 300 milliliters of a(n) 90% acid solution to get a(n) 64.5% solution?
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Equation:
acid + acid = acid
0.90*300 + 0.60x = 0.645(300+x)
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Multiply thru by 1000 to get:
900*300 + 600x = 645*300 + 645x
45x = 255*300
x = 1700 ml (amt. of 60% solution to add).
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Cheers,
Stan H.
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