SOLUTION: How much water must be evaporated from a 20 liter 32% salt solution if the desired concentration is 50%?

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Question 1005200: How much water must be evaporated from a 20 liter 32% salt solution if the desired concentration is 50%?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
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How much water must be evaporated from a 20 liter 32% salt solution if the desired concentration is 50%?
:
let x = amt of water to be evaporated
:
The actual amt of salt will be the same
.32(20) = .50(20-x)
6.4 = 10 - .5x
.5x = 10 - 6.4
x = 3.6/.5
x = 7.2 liters of water to be evaporated