SOLUTION: River's chemistry class is doing an experiment in which the students create a 30% hydrochloric acid mixture by mixing a certain amount of 25% solution with a different amount of 50

Question 1088504: River's chemistry class is doing an experiment in which the students create a 30% hydrochloric acid mixture by mixing a certain amount of 25% solution with a different amount of 50% solution. The amount of 25% solution used is 20 liters less than 5 times the amount of 50% solution used. How much of the 25% solution and the 50% solution are needed in all?

Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
Let n be the amount of 50% solution to be used. Then the 25% solution would be 5n-20. So:
.50n+.25(5n-20)=.30(n+5n-20)
.50n+1.25n-5=.30n+1.5n-6
.05n=1
n=20
They need 20 liters of 50% solution and 80 liters of 25% solution
☺☺☺☺
RELATED QUESTIONS
River's chemistry class is doing an experiment in which the students create a 30%... (answered by Boreal)

A class of nursing students will perform an experiment wherein they will need a solution (answered by stanbon)

For an experiment, a chemist needs 12 liters of a solution that is 30% hydrochloric acid. (answered by mananth)

Sheila needs 30 mL of a 19.2% acid solution for a chemistry experiment. She has a 12%... (answered by lwsshak3,TimothyLamb)

A chemistry student needs to make a solution that is 70% water and 30% hydrochloric... (answered by stanbon)

In your chemistry lab, you have a bottle of 2% hydrochloric acid solution and a bottle of (answered by stanbon)

A chemist, has one 30 litre bottle of 15% hydrochloric acid and one 30 litre bottle of... (answered by lynnlo,stanbon)

A chemistry experiment requires 95ml of an acid solution per student. How many litres of... (answered by josmiceli)

A chemistry teacher needs to strengthen a 12% solution of acid to strength s by mixing it (answered by jorel1380)