SOLUTION: A pharmacist needs to make 200 mL of a 10% hydrogen peroxide solution. She will make it from some 8% hydrogen peroxide solution and some 16% hydrogen peroxide solution. How much of

Question 996622: A pharmacist needs to make 200 mL of a 10% hydrogen peroxide solution. She will make it from some 8% hydrogen peroxide solution and some 16% hydrogen peroxide solution. How much of the 8% solution and 16% solution should she use?
Found 2 solutions by josgarithmetic, stanbon:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
Learn from this example:
two-part mixture percents, one variable
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A pharmacist needs to make 200 mL of a 10% hydrogen peroxide solution. She will make it from some 8% hydrogen peroxide solution and some 16% hydrogen peroxide solution. How much of the 8% solution and 16% solution should she use?
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Equation:
hyper + hyper = hyper
0.08x + 0.16(200-x) = 0.10*200
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8x + 16*200 - 16x = 10*200
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-8x = -6*200
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x = (3/4)200
x = 150 mL (amt. of 8% solution needed)
200-x = 50 mL (amt. of 16% solution needed)
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Cheers,
Stan H.
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