Question 351038
A chemist has one solution that is 15% acid and another solution that is 25% acid. How much of the 15% solution is needed to make 100 L of a solution that is 18% acid?
------------
f = amount of 15%
t = amount of 25%
----------
f + t = 100 (total solution)
0.15f + 0.25t = 0.18*100 (total acid)
You can finish it.