SOLUTION: Doreen Schmidt is a chemist. She needs to prepare 36 ounces of a 17% hydrochloric acid solution. Find the amount of 18% solution and the amount of 9% solution she should mix to get

Algebra ->  Customizable Word Problem Solvers  -> Travel -> SOLUTION: Doreen Schmidt is a chemist. She needs to prepare 36 ounces of a 17% hydrochloric acid solution. Find the amount of 18% solution and the amount of 9% solution she should mix to get      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 1032467: Doreen Schmidt is a chemist. She needs to prepare 36 ounces of a 17% hydrochloric acid solution. Find the amount of 18% solution and the amount of 9% solution she should mix to get this solution.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Doreen Schmidt is a chemist. She needs to prepare 36 ounces of a 17% hydrochloric acid solution. Find the amount of 18% solution and the amount of 9% solution she should mix to get this solution.
------
Quantity Eq: e + n = 36 oz
Acid Eq:: 18e + 9n = 17*36
----------------------------------
Modify for elimination:
e + n = 36
2e +n = 17*4
--------------------
Subtract and solve for "e":
e = 32 oz (amt. of 18% needed)
n = 36-32 = 4 oz (amt. of 9% needed)
------------
Cheers,
Stan H.
------------