SOLUTION: How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? ____

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Question 865041: How much stock solution of hydrogen peroxide 8% will you need to make 320ml of hydrogen peroxide 2% solution? ____
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
from the stand point of water
.92x+y=.98(320),
x+y=320
x=80, y=240
80 ml of peroxide and 240 ml water
from the stand point of peroxide
.08x=.02(320)
x=80 ml of peroxide