Question 557159
A chemist needs to make 30 ounces of a 30% alcohol solution by mixing a 15% alcohol solution with a 40% alcohol solution. How many ounces of the 40% solution does she need
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Equation:
alcohol + alcohol = alcohol
0.15x + 0.40(30-x) = 0.30*30
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Multiply thru by 100:
15x + 40*30 - 40x = 30*30
-25x = -10*30
x = (2/5)*30
x = 12 ounces (amt of 15% solution needed)
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30-x = 18 ounces (amt of 40% solution needed)
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Cheers,
Stan H.
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