SOLUTION: A chemist named Mr. Nobel has 20 Milliliters of a solution that is 40% acid. He wants to increase the acid content of the solution to make it a 60% acid solution. How many millilit

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: A chemist named Mr. Nobel has 20 Milliliters of a solution that is 40% acid. He wants to increase the acid content of the solution to make it a 60% acid solution. How many millilit      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 996841: A chemist named Mr. Nobel has 20 Milliliters of a solution that is 40% acid. He wants to increase the acid content of the solution to make it a 60% acid solution. How many milliliters of pure acid should he add to the solution?
Answer by josgarithmetic(39616) About Me  (Show Source):
You can put this solution on YOUR website!
With that description, he must have concentrations as all w/v OR v/v exclusively.

y, how much of the pure acid to add.

%2820%2A40%2B100%2Ay%29%2F%28y%2B20%29=60

%282%2A40%2B10y%29%2F%28y%2B20%29=6

%2840%2B5y%29%2F%28y%2B20%29=3

40%2B5y=3y%2B60
2y=20

highlight%28y=10%29