# How much pure acid should be mixed with 2 gallons of a 50% acid solution in order to get an 80% acid solution?

##### 1 Answer

May 2, 2017

#### Answer:

You should add 3 gal of pure acid to 2 gal of 50 % acid.

#### Explanation:

You have

You can use the dilution formulas

Let the volume of pure acid be

∴ You add 3 gal of 100 % acid to 2 gal of 50 % acid.