SOLUTION: two acid solutions are available. One has a concentration of 20% acid and another that is 45% acid. How much of each acid must be mixed to obtain a 9L acid solution of 30% concentr
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Question 974996: two acid solutions are available. One has a concentration of 20% acid and another that is 45% acid. How much of each acid must be mixed to obtain a 9L acid solution of 30% concentration?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
two acid solutions are available. One has a concentration of 20% acid and another that is 45% acid. How much of each acid must be mixed to obtain a 9L acid solution of 30% concentration?
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Equation::
acid + acid = acid
0.20x + 0.45(9-x) = 0.30*9
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20x + 45*9 - 45x = 30*9
-25x = -15*9
x = (3/5)9
x = 27/5
x = 5.4L (amt. of 20% solution needed)
9-x = 3.6L (amt. of 45% solution needed)
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Cheers,
Stan H.
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