SOLUTION: A chemist has some 8% hydrogen peroxide solution and some 3% hydrogen peroxide solution, how many milliliters of each should be used to make 500-milliliter solution that is 4%?
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Question 301657: A chemist has some 8% hydrogen peroxide solution and some 3% hydrogen peroxide solution, how many milliliters of each should be used to make 500-milliliter solution that is 4%? Found 2 solutions by richwmiller, josmiceli:Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! Let = ml of 8% solution needed
Let = ml of 3% solution needed
given:
hydrogen peroxide in 8% solution: ml
hydrogen peroxide in 3% solution: ml
-----------------
(1)
and
(2)
Multiply both sides of (2) by
and subtract (2) from (1)
(1)
(2)
and, since
100 ml of 8% solution and 400 ml of 3% solution are needed
check:
OK