SOLUTION: A Chemist mixes distilled water with 70% solution of sulfuric acid to produce a 30% solution. If 12 liters of distilled water is used, how much 30% solution is produced?

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Question 373733: A Chemist mixes distilled water with 70% solution of sulfuric acid to produce a 30% solution. If 12 liters of distilled water is used, how much 30% solution is produced?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let x = liters of 70% solution used
In words:
(final liters of acid)/(final liters of solution) = 30%
---------
given:
.7x = liters of acid in 70% solution
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.7x%2F%28x+%2B+12%29+=+.3
.7x+=+.3%2A%28x+%2B+12%29
.7x+=+.3x+%2B+3.6
.4x+=+3.6
x+=+9
In the 30% solution, there are 9 liters of 70% solution
and 12 liters of distilled water
9+%2B+12+=+21 liters of 30% solution produced