<PRE><B>Question 929629</B>
how many milliliters of a 10% hydrogen peroxide solution and how many milliliters of a 2% hydrogen peroxide solution should be mixed to obtain 500 mL if a 4% hydrogen peroxide solution?
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Equation:
hydro + hydro = hydro
0.02x + 0.10(500-x) = 0.04*500
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2x + 10*500 - 10x = 4*500
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-8x = -6*500
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x = (3/4)500
x = 3*125 = 375 ml (amt. of 2% solution needed)
500-x = 125 ml (amt. of 10% solution needed)
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Cheers,
Stan H.
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