2007-03-20 17:03:35 · 5 answers · asked by AVTAR S 1 in Science & Mathematics ➔ Chemistry
Fresh water. Dissolved salt increases the boiling point. Boiling point elevation is an important laboratory analytic tool for determining molecular weight. Previous responses are incorrect.
2007-03-20 17:22:51 · answer #1 · answered by Anonymous · 2⤊ 2⤋
Check out colligative properties in any chem book. The vapor pressure of a solvent is lowered by the presence of a solute.
P(solvent) = X(solvent) Po(solvent)
Where P is the vapor pressure (Po being for pure solvent) and X is the mole fraction.
To simplify, the vapor pressure of a solution with a non-volatile solute is always less than the vapor pressure of the pure solvent. Try it, make some salt water and put equal sized puddles of it and fresh water and let them stand overnight.
2007-03-21 00:24:28 · answer #2 · answered by kentucky 6 · 1⤊ 0⤋
Wouldn't it evaporate at the same time given the exact same conditions? I figure it would be exactly the same, water is water, just the salt water will leave the salt behind. I could be wrong though! :)
2007-03-21 00:07:40 · answer #3 · answered by mama of 2 2 · 0⤊ 3⤋
same. water is water
the salt in salt water will not evaporate and will just stay behind
2007-03-21 00:07:07 · answer #4 · answered by qwerqwerqweqwe 1 · 0⤊ 3⤋
Salt water because the salt would weaken the molecule pull energy against each other making it's bond weaker. Thus, it would be easier to evaporate.
I hope this helps. :)
2007-03-21 00:10:54 · answer #5 · answered by Juni Mccoy 3 · 0⤊ 3⤋