When weighing liquid ethanol, why do you have to place water in the beaker prior to adding the ethanol to that same beaker?
2 answers
I have no idea but I'd like to know when you find out. If you want to know the mass of the ethanol you won't get it this way. Perhaps if you explained how this question was generated (what experiment/subject/procedure) I may be able to get a better handle on it.
We were told to make a to make a 0.40% (wt/vol) stock solution by weighing 400 mg of absolute ethanol into a tared beaker that contained 15 mL of water and has most of the opening covered with Parafilm.
2 answers