SOLUTION: A chemist must mix 6 liters of a 30% acid solution with some of an 80% acid solution to get a 50% acid solution to get a 50% acid solution. How many liters of the 80% solution sho

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Question 728598: A chemist must mix 6 liters of a 30% acid solution with some of an 80% acid solution to get a 50% acid solution to get a 50% acid solution. How many liters of the 80% solution should be used ?
Answer by checkley79(3341) About Me  (Show Source):
You can put this solution on YOUR website!
.80X+.30*6=.50(6+X)
.80X+1.8=3+.50X
.80X-.50X=3-1.8
.30X=1.2
X=1.2/.30
X=4 LITERS OF THE 80% SOLUTION IS USED.
PROOF:
.80*4+.30*6=.50(6+4)
3.2+1.8=.5*10
5=5