How do you prepare 3 percent of hydrogen peroxide from 30 percent of hydrogen peroxide?

Lets say you want an end volume of 500 ml of 3% peroxide. But you dont know how much 30% peroxide to use.

Concentration1 X Volume1 = Concentration2 X Volume2

30/100 X unknown ml = 3/100 X 500 ml

unknown ml = 50 ml

50ml of 30% added to pure 450 ml of water = 500 ml 3 % peroxide.

· 3 years ago