MadSci Network: Chemistry

Subject: Does the amount of salt in a water solution affect evaporation rates?

Date: Wed Mar 18 23:47:54 1998
Posted by Carissa
Grade level: 10-12
School: No school entered.
City: No city entered. State/Province: CA
Country: USA
Area of science: Chemistry
ID: 890286474.Ch

That is the question that I am pondering.  I conducted the experiment 
3 times, and I found out that the solution with 0% salt had a faster 
evaporation rate than those of 5%, 10% and 15% (all were with 500 mL 
of water).  I have been searching and thinking of reasons why this is 
so, but I have been unlucky in finding the answer.  Is there a reason 
why the evaporation rate was different?  Or is the evaporation rate 
the same?  I tried to control all of the variables.  I kept them in 
the same window with the same amount of light, I used identical 
glasses, and I used the same water.  The only variable was that of the 
salt solution.  Please help me because I do not know of anyone who 
ever did this experiment, and I cannot think of the reasonable 

Re: Does the amount of salt in a water solution affect evaporation rates?

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