SOLUTION: A chemist needs 18 liters of a 30% acid solution. How much of a 20% solution should be mixed with a 40% solution to get that (round your answer to the nearest liter)?
anyone who
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anyone who
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Question 651725: A chemist needs 18 liters of a 30% acid solution. How much of a 20% solution should be mixed with a 40% solution to get that (round your answer to the nearest liter)?
anyone who can show me how to do this great :) i was stuck on it. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A chemist needs 18 liters of a 30% acid solution. How much of a 20% solution should be mixed with a 40%
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Equation:
acid + acid = acid
0.20x + 0.40(18-x) = 0.30*18
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Multiply thru by 100 to get:
20x + 40*18 - 40x = 30*18
-20x = -10*18
x = 9 liters (amt. of 20% solution needed)
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18-x = 9 liters (amt. of 40% solution needed)
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Cheers,
Stan H.
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