SOLUTION: A laboratory technician needs to make a 135-liter batch of a 20% acid solution. How can the laboratory technician combine a batch of an acid solution that is pure acid with anothe
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Question 935906: A laboratory technician needs to make a 135-liter batch of a 20% acid solution. How can the laboratory technician combine a batch of an acid solution that is pure acid with another that is 10% to get the desired concentration?
The laboratory technician can combine --L of the pure acid solution with --L of the 10% acid solution to get the desired concentration. Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of pure acid needed
Let = liters of 10% solution needed = liters of pure acid in 10% solution
-----------------------------------------
(1)
(2)
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(2)
(2)
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Subtract (1) from (2)
(2)
(1)
----------------------
and
(1)
(1)
(1)
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15 liters of pure acid are needed
120 liters of 10% solution are needed
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check:
(2)
(2)
(2)
(2)
OK
