SOLUTION: A chemist needs to prepare 32 ounces of 10% solution. How many ounces of 16% and 8% does she need?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: A chemist needs to prepare 32 ounces of 10% solution. How many ounces of 16% and 8% does she need?      Log On


   

Question 966752: A chemist needs to prepare 32 ounces of 10% solution. How many ounces of 16% and 8% does she need?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
want 10% acid result mixture
v = how much of the 8% acid to use
32-v = how much of the 16% acid to use

%288v%2B16%2832-v%29%29%2F32=10

There is a lesson for two-part mixture problem using two variables, but the equation shown here in a single variable can be quicker.