What quantity of water should be added to reduce 20 liters of 80% acidic liquid to 20% acidic liquid? Pick.
A) 30liters
B) 50liters
C) 60liters
D) 70liters
E) 80liters
Acid in 20 liters = 80% of 20 = 16 liters   Suppose x liters of water be added.   Then 16 liters of acid in 20+x liters of diluted solution   20% of 20+x = 16   20+x = 80   x = 60liters   Answer is 60liters
<result>C</result>
What quantity of water should be added to reduce 20 liters of 80% acidic liquid to 20% acidic liquid?