Prepare the solution to be extracted by dissolving 2.5 g of a 1:1 mixture of ben
ID: 887788 • Letter: P
Question
Prepare the solution to be extracted by dissolving 2.5 g of a 1:1 mixture of benzoic acid/ biphenyl in 25 mL of tert-butyl methyl ether (MTBE) . Using a 125 mL separatory funnel extract the ether solution with a mixture containing 10 mL of distilled water and 15 mL of saturated NaHCO3 . Repeat
After removing the aqueous layer, extract the organic layer remaining in the separatory funnel with 25 mL of saturated NaCl solution
For the aqueous layer, adjust the pH to approximately 3 by slowly adding concentrated HCl dropwise. A white precipitate should form above the solution..
Why was it necessary to add hydrochloric acid to the aqueous layer?
Explanation / Answer
As overall formed solution is basic in nature so for maintaining the acidic media, HCL added to the aqueous layer of the solution.