SOLUTION: How much water (ounces)must be evaporated from 16 ounces of a 2% salt solution to make a 4% salt solution?

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Question 96515: How much water (ounces)must be evaporated from 16 ounces of a 2% salt solution to make a 4% salt solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How much water (ounces)must be evaporated from 16 ounces of a 2% salt solution to make a 4% salt solution?
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2% solution DATA:
Amt. = 16 ounces ; salt = 0.02*16 = 0.32 ounces
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Water DATA:
Amt. = x ounces ; salt = 0
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Resulting Mixture DATA
Amt. = 16-x ; salt = 0.04(16-x) = 0.64 - 0.04x ounces
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EQUATION:
salt - salt = salt
0.32 - 0 = 0.64 - 0.04x
0.32 = 0.04x
x = 8 ounces of water must be evaporated
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Cheers,
Stan H.