Math CentralQuandaries & Queries


Question from Scott:

In order to make a 25% solution with 96% Sulfuric Acid, how much of the Sulfuric do I add to DI water to make up 2000ml??

Hi Scott,

The desired 2000 ml is 25% sulfuric acid so the amount of acid in this mixture is $25\% \mbox{ of } 2000$ or $\large \frac{25}{100} \times 2000$ ml. Suppose that you pour $S$ ml of the $96\%$ solution into a container then this mixture contains $\large \frac{96}{100} \times S$ ml of sulfuric acid. This has to be $\frac{25}{100} \times 2000$ ml. Solve for $S.$ Fill the container up to the 2000 ml mark and you have what you need.


About Math Central


Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.
Quandaries & Queries page Home page University of Regina PIMS