SOLUTION: A chemist needs 180 milliliters of a 61% solution but has only 54% and 72% solutions available. Find how many milliliters of each that should be mixed to get the desired solution?
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Question 736477: A chemist needs 180 milliliters of a 61% solution but has only 54% and 72% solutions available. Find how many milliliters of each that should be mixed to get the desired solution? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Let = ml of 54% solution needed
Let = ml of 72% solution needed
given:
(1)
(2)
------------------------------
(2)
(2)
(2)
Multiply both sides of (1) by
and subtract (1) from (2)
(2)
(1)
and, since
(1)
(1)
110 ml of 54% solution is needed
70 ml of 72% solution is needed
check:
(2)
(2)
(2)
OK
