Question

A chemist has 20 gallons of solution with 12% saline. How much pure saline (100% saline) needs to be added to the 20 gallons to create a mixture with 15% saline content? Round your answer to the nearest tenth (if you answer this please let me know how you got the answer, thank you!)

Answer 1

0.6 gallons of pure saline

Explanation:

15-12=3

3=×0.03

20 gallons ×0.03=0.6 gallons