<PRE><B>Question 348257</B>
How much water must be added to 20.0 ml of a 
60.0% saline solution in order 
to make a 45.0% saline solution?
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Equation:
salt + salt = salt
0*x + 0.60*20 = 0.45(x+20)
Multiply thru by 100 to get:
60*20 = 45x + 45*20
45x = 15*20
x = (1/3)20
x = 6 2/3 ml (amount of water needed for the mixture)
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Cheers,
Stan H.
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