Question 1030639
the solute is the material you are working in.
it is immersed in the solvent which can be another material that you are not working with, such as water.
here's some references:


<a href = "http://www.chem4kids.com/files/matter_solution.html" target = "_blank">http://www.chem4kids.com/files/matter_solution.html</a>


<a href = "https://in.answers.yahoo.com/question/index?qid=20090320025445AAu4mTA" target = "_blank">https://in.answers.yahoo.com/question/index?qid=20090320025445AAu4mTA</a>


in your problem, i believe you want 15% solute and 85% solvent for a total of 250 milli-liters.


your source is a solution that is 80% solute and 20% solvent.


that's my take.