David Robertson works as a chemical engineer for U.S. peroxide Corporation. David has 2500 gallons of commercial-grade hydrogen peroxide solution that is 60% pure hydrogen peroxide. How much distilled water(which is 0% hydrogen peroxide) will David need to add to the solution to create a new solution that is 25% hydrogen peroxide?

Question

David Robertson works  as a chemical engineer for U.S. peroxide Corporation. David has 2500 gallons of commercial-grade hydrogen peroxide solution that is 60% pure hydrogen peroxide. How much distilled water(which is 0% hydrogen peroxide) will David need to add to the solution to create a new solution that is 25% hydrogen peroxide?

Reiny · Answer

amount of water added ---- x gallons .6(2500) + 0.0x = .25(2500 + x) solve for x