SOLUTION: A chemist needs 190 milliliters of a 74% solution but has only 60% and 98% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.

Question 513849: A chemist needs 190 milliliters of a 74% solution but has only 60% and 98% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A chemist needs 190 milliliters of a 74% solution but has only 60% and 98% solutions available. Find how many milliliters of each that should be mixed to get the desired solution.
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Equation:
active + active = active
0.60x + 0.98(190-x) = 0.74*190
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Multiply thru by 100 to get:
60x + 98*190 - 98x = 74*190
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-38x = -24*190
x = 120 ml (amt. of 60% solution needed)
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190-x = 70 ml (amt. of 98% solution needed)
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Cheers,
Stan H.
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