SOLUTION: How many kg of water must be evaporated from 100 kg of a 6% salt solution to obtain a 20% salt solution?

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Question 697033: How many kg of water must be evaporated from 100 kg of a 6% salt solution to obtain a 20% salt solution?
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
How many kg of water must be evaporated from 100 kg of a 6% salt solution to obtain a 20% salt solution?
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Equation:
water - water = water
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0.94*100 - 1*x = 0.80(100 - x)
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94*100 - 100x = 80*100 - 80x
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-20x = -14*100
x = 70 kg (amt. of water to evaporate)
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Cheers,
Stan H.
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