SOLUTION: A chemist has 500g of a solution that is 40% acid. How many grams of water must be added to reduce the acidity to 25%?

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: A chemist has 500g of a solution that is 40% acid. How many grams of water must be added to reduce the acidity to 25%?      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 476591: A chemist has 500g of a solution that is 40% acid. How many grams of water must be added to reduce the acidity to 25%?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
A chemist has 500g of a solution that is 40% acid.
How many grams of water must be added to reduce the acidity to 25%?
;
Let x = amt of water required to accomplish this
A simple equation
:
.40(500) = .25(x+500)
200 = .25x + 125
200 - 125 = .25x
75 = .25x
x = 75%2F.25
x = 300 grams of water required
;
:
Check, amt of acid should be equal
.40(500) = .25(300+500)
200 = 200