SOLUTION: A 40 liter of 30% ethyl alcohol needs to be reduced to a concentration of 25% ethy alcohol. How much of a 20% ethyl alcohol should be mixed to it in order to achieve the desired co

Question 1174695: A 40 liter of 30% ethyl alcohol needs to be reduced to a concentration of 25% ethy alcohol. How much of a 20% ethyl alcohol should be mixed to it in order to achieve the desired concentration?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!


Hi
A 40 liter of 30% ethyl alcohol: How much  "x"  of a 20% ethyl alcohol should be added to reduce the concentration to 25% ethyl alcohol. 
  .30(40L) + .20x = .25(40+x)
         .05(40L) = .05x
             x = 40L of a 20% ethyl alcohol should be added
  12 + 8 = (1/4)80  checks
         
Wish You the Best in your Studies.

RELATED QUESTIONS
How many milliliters of 40% ethyl alcohol can be prepared from 135 milliliters of 95%... (answered by josgarithmetic)

How many milliliters of a 60% ethyl alcohol should be mixed with water to make 1 L of 15% (answered by robertb)

Mr. Key has 50 liters of a 70% ethyl alcohol solution. How many liters of pure ethyl... (answered by Earlsdon)

what is the weight, in grams, of ethyl alcohol that exactly fills a 200.0 mL container.... (answered by jojo14344)

A laboratory technician prepares 200 mL of 35% ethyl alcohol from a 95% ethyl alcohol... (answered by josmiceli)

A nurse has 1 liter of a solution that is 20% alcohol. How much pure alcohol must she add (answered by Alan3354)

You are to prepare 1500 milliliters of an alcohol solution containing 0.3 ethyl alcohol... (answered by josmiceli)

A nurse has 1 liter of a solution that is 20% alcohol. How much pure alchol must she add... (answered by stanbon)

how much alcohol should be added to 1 liter of a 30% alcohol solution to get a 50%... (answered by richwmiller)