SOLUTION: A chemist needs to create a 20% acid solution. She has 4L of a 30% acid solution in a 20-L container. How much water should she mix with this solution to decrease the concentration

Question 944407: A chemist needs to create a 20% acid solution. She has 4L of a 30% acid solution in a 20-L container. How much water should she mix with this solution to decrease the concentration to the desired 20%?
Found 2 solutions by Alan3354, MathTherapy:
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A chemist needs to create a 20% acid solution. She has 4L of a 30% acid solution in a 20-L container. How much water should she mix with this solution to decrease the concentration to the desired 20%?
----------
Add W liters of water
30*4 + 0*W = 20*(W + 4)

Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

A chemist needs to create a 20% acid solution. She has 4L of a 30% acid solution in a 20-L container. How much water should she mix with this solution to decrease the concentration to the desired 20%?

Amount of water to mix: L
RELATED QUESTIONS
a chemist needs 6 liters of 20 percent acid solution. he has available 25 percent acid... (answered by mananth)
a chemist needs 6 liters of 20 percent acid solution. he has available 25 percent acid... (answered by mananth)
A chemist wants to get a 50% solution by mixing 8 L of 60% acid solution with 20% acid... (answered by josgarithmetic)
A chemist has 6L of 50 % acid solution. how much water to be added to obtain 20% acid... (answered by checkley77,Alan3354)
A chemist has 200 milliliters of a solution that is 20% acid. She needs a solution that... (answered by robertb)
A chemist mixed pure acid with water to make 10 L of a 30% acid solution. How much pure... (answered by Alan3354)
colette has some 8% acid to which she adds 10 liters of 20% acid to get a 15% acid... (answered by Paul)
A chemist needs to create a solution consisting of 70% hydrochloric acid (the other 30%... (answered by TimothyLamb)
A chemist needs 10 L of a solution that is 35% acid. In his lab, he has a supply of a 45% (answered by josgarithmetic)