<PRE><B>Question 351004</B>
To conduct a new experiment, a scientist needs a 23% salt water solution. How much of a 10.5% solution must be mixed with 25 pints of a 39% solution to get the proper solution?
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Equation:
salt + salt = salt
0.105x + 0.39*25 = 0.23(x+25)
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Multiply thru by 1000.
105x + 390*25 = 230x + 230*25
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125x = 160*25
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x = 32 pints (amt. of 10.5% solution needed for the mixture)
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Cheers,
Stan H.</PRE>