<PRE><B>Question 706708</B>
how much water should be added to 14 mL of 19% alcohol solution to reduce the concentration to 7%?
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Equation:
water + water = water
0.81*14 + 1*x = 0.93(14+x)
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81*14 + 100x = 93*14 + 93x
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7x = 12*14
x = 24ml (amt. of water to add)
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Cheers,
Stan H.
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