SOLUTION: How many liters of water should be evaporated from 60 liters of a 28% salt solution so that the remaining solution contains 32% salt?

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Question 1016178: How many liters of water should be evaporated from 60 liters of a 28% salt solution so that the remaining solution contains 32% salt?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many liters of water should be evaporated from 60 liters of a 28% salt solution so that the remaining solution contains 32% salt?
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Equation:
water - water = water
0.72*60 - x = 0.68(60-x)
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72*60 - 100x = 68*60 - 68x
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-32x = -4*60
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x = (1/8)60
x = 7.5 liters (amt of water to evaporate)
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Cheers,
Stan H.