In the extraction experiment, what is the purpose of adding sodium chloride (NaC
ID: 494889 • Letter: I
Question
In the extraction experiment, what is the purpose of adding sodium chloride (NaCl) and sodium sulfate (Na_2 SO_4)? Give a detailed explanation. During an extraction experiment, a student lost track of which layer was the organic layer. How could the student figure that out? Why is it necessary to remove the stopper from a separator| funnel when draining the liquid through the stopcock? Give an example where liquid-liquid (acid-base) extraction fails, a case where extraction cannot be used What were the essential safety precaution you had to take while doing this experiment?Explanation / Answer
Ans 1. Wheneve any organic compound is separated by extraction experiment, NaCl and Na2SO4 are used.
the bulk of water is often removed by shaking the organic layer with saturated aqueous sodium chloride solution. The salt solution being hypertonic removes all the water from organic layer into water layer.
Now the final traces of water are removed by treating the organic layer with some drying agent. Sodium sulfate is used as drying agent. It readily takes up the water to become hydrated.