SOLUTION: How many liters of pure acid must be mixed with 20 liters of a 15% acid solution to get 20% mixture?

Question 125444: How many liters of pure acid must be mixed with 20 liters of a 15% acid solution to get 20% mixture?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
How many liters of pure acid must be mixed with 20 liters of a 15% acid solution to get 20% mixture?
:
Let x = amt of pure acid required
:
This is to be mixed with 20 liters, therefore:
The amt of the final mixture will = (x+20)
:
Pure acid will be 1.0x
:
.15(20) + 1.0x = .20(x+ 20)
:
3 + 1x + .20x + 4
:
1x - .2x = 4 - 3
:
.8x = 1
x =
x = 1.25 liters of pure acid to produce a 20% mixture
:
:
Check
.15(20) + 1.25 = .20(21.25)
3 + 1.25 = 4.25; confirms our solution
RELATED QUESTIONS
How many liters of pure acid must be mixed with 20 liters of a 15% acid solution to get a (answered by josmiceli)

How many liters of pure acid must be mixed with 20 liters of a 15% solution to get a 20%... (answered by josmiceli)

How many liters of pure acid must be mixed with 14 liters of 20% acid solution to get a... (answered by Fombitz)

How many liters of 50% acid must be mixed with 20% acid to get 10 liters of a 30%... (answered by ewatrrr)

How many liters of 50% acid must be mixed with 20% acid to get 10 liters of a 30%... (answered by Alan3354)

how many liters of a 50% acid solution must be mixed with a 20% acid solution to get 270... (answered by mananth)

How many liters of a 60% acid solution must be mixed with 20% acid solution to get 320... (answered by Alan3354)

how many liters of a 20% solution must be mixed with 40 Liters of an 80% solution, in... (answered by lwsshak3)

How much pure acid must be mixed with 80 liters of 20% acid to get 90 %... (answered by nerdybill)