Question 736924: How many liters of 400L of 20% NaCl solution must be replaced with 70% NaCl solution so that the resulting solution is 41%? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of 20% solution to be removed
Also, = liters of 70% solution to be added = liters of NaCl removed = liters of NaCl added
-------------- liters of NaCl are added liters of NaCl to start with
--------------
168 liters of 400L of 20% NaCl solution must be
replaced with 70% NaCl solution
check:
OK
