SOLUTION: A chemist needs 12 liters of a 36% acid solution. How many liters of 18% acid should be combined with a 45% acid solution to obtain the proper mixture?
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Question 617776: A chemist needs 12 liters of a 36% acid solution. How many liters of 18% acid should be combined with a 45% acid solution to obtain the proper mixture?
My teacher didn't teach us this at all. Please, provide an explanation. Found 2 solutions by josmiceli, scott8148:Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of 18% solution needed
Let = liters of 45% solution needed = liters of acid in 18% solution = liters of acid in 45% solution
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given:
(1)
(2)
--------------------------
(2)
(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
and, since
(1)
(1)
4 liters of 18% solution are needed
12 liters of 45% solution are needed