SOLUTION: A 60 mililiter solution has 50% acid. How much pure water is needed to get 30% acid?

Algebra.Com
Question 126615: A 60 mililiter solution has 50% acid. How much pure water is needed to get 30% acid?
Answer by checkley71(8403)   (Show Source): You can put this solution on YOUR website!
.5*60=.3(60+x)
30=18+.3x
.3x=30-18
.3x=12
x=12/.3
x=40 ml. of water is needed.
PROOF:
.5*60=.3(60+40)
30=.3*100
30=30

RELATED QUESTIONS

A 60 mililiter soulution has 50% acid. How much pure water is needed to get 25%... (answered by edjones)
a chemist has 40 grams of 25% sulfuric acid solution. how much pure sulfuric acid must... (answered by stanbon)
How much pure acid should be mixed with four gallons of a 50% acid solution in order to... (answered by oberobic)
how much pure acid should be mixed with 5 gallons of a 30% acid solution in order to get... (answered by ewatrrr)
how much pure acid must be added to 25 ounces of a solution of acid and water that is 20% (answered by ewatrrr)
A chemist mixed pure acid with water to make 10 L of a 30% acid solution. How much pure... (answered by Alan3354)
How much pure acid must be added to a 30% acid solution to make a 60L solution which is... (answered by josgarithmetic)
Solution A is 25% acid and solution B is 40% acid. How much of each is needed to make 60... (answered by nyc_function,modi.kk91)
A chemist has a solution which is 60% pure acid and another solution which is 35% pure... (answered by fractalier)