<PRE><B>Question 1078772</B>
needs to prepare 28 ounces of a 9% hydrochloric acid solution. find the amount of 14% solution and the amount of 7% solution she should mix. how many ounces of the 14% acid solution should be in the mixture?
Equation:
acid + acid = acid
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0.14x + 0.07(28-x) = 0.09*28
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14x + 7*28 - 7x = 9*28
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7x = 2*28
x = 8 ounces (amt. of 14% solution needed)
28-x = 20 ounces (amt. of 7% solution needed)
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Cheers,
Stan H.
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