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Fresh water weighs almost exactly 1 kg per liter.

/in /by

a. Fresh water weighs almost exactly 1 kg per liter. Salt water
from the ocean weighs 1.027 kg per liter. Assuming the volume of water is the same in both and that the dissolved solids in ocean water is pure Sodium Chloride (NaCl) [which isn’t exactly true], how much salt is in each liter of salt water by weight and by moles? How much water would need to be removed by evaporation to have a saturated salt solution. Hint: check out Table 9.2 in Concepts of Chemistry. How much energy is needed to evaporate that much water?

 
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