Question 973749: pure acid is to be added to a 10%acid solution to obtain 90l of 22% solution .
what amounts of each should be used? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = liters of pure acid needed
Let = liters of 10% acid solution needed = liters of acid in 10% solution
-----------------------------
(1)
(2)
---------------------
(1)
---------------------
Subtract (1) from (2)
(2)
(1)
----------------------
and
(2)
(2)
12 liters of pure acid are needed
78 liters of 10% acid solution are needed
--------------------------------------
check:
(1)
(1)
(1)
(1)
(1)
OK
