What is the purpose of adding MgSO4 in step 4, Part B of the experiment?
Pc tossoeuie sd B. REACTION WORK-UP 1. Using a disposable Pasteur pipette, add concentrated HCI (CAUTION: corrosive, wear gloves] to the reaction mixture in the fume hood 10 drops at a time very slowly until it reaches pÅi 1. Make sure to swirl the flask and check the pH using pH paper after each addition. pH 1. Make sure to swirl the flask and check the pH using pH paper after each addition. cad Lab Tips: Separatory Funnels in the Lab Manual then pour the acidified solution into a 125 mL separatory funnel in the fume hood in your assigned space. 3. Perform liquid-liquid extractions of the aqueous layer with three 5 mL portions of ethyl acetate, each time rinsing the Erlenmeyer flask with the ethyl acetate before adding to the separatory funnel and collecting the ethyl acetate layer in a clean, dry 125 mL. Erlenmeyer flask ICAUTION: pressure build-up; vent frequentlyl