Question 273772: How many liters of water must be evaporated from 10 L of a 40% salt solution to produce a 50% solution? Found 4 solutions by ankor@dixie-net.com, amalm06, ikleyn, greenestamps:Answer by ankor@dixie-net.com(22740) (Show Source):
You can put this solution on YOUR website! How many liters of water must be evaporated from 10 L of a 40% salt solution to produce a 50% solution?
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Let x = amt of water to evaporated
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Write an amt of salt equation (amt of salt remains unchanged)
.4(10) = .5(10-x)
4 = 5 - .5x
.5x = 5 - 4
.5x = 1
x = 2 Liters to be evaporated
No salt solution with the concentration above 27% - 28%.
It does not exist and can not exist.
See this Wikipedia article https://en.wikipedia.org/wiki/Saline_water
Ignoring the scientific fact that these percentages of salt solution are not possible, and treating this purely as a mathematical exercise, note that the amount of salt in 10 L of 40% salt is 4L.
You want that same amount of salt to be 50% of the final mixture; that means the final mixture must be 8 L.
Since you started with 10L and ended with 8L, the amount of water evaporated was 2L.
