SOLUTION: how many pounds of water must be evaporated from 50lbs of a 3% salt solution so that the remaining solution will be a 5% salt?

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Question 488313: how many pounds of water must be evaporated from 50lbs of a 3% salt solution so that the remaining solution will be a 5% salt?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
how many pounds of water must be evaporated from 50lbs of a 3% salt solution so that the remaining solution will be a 5% salt?
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Equation:
water - water = water
0.97*50 - x = 0.95(50-x)
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Multiply thru by 100 to get:
97*50 - 100x = 95*50-95x
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2*50 = 5x
x = 20 lbs (amt. of water to evaporate)
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Cheers,
Stan H.