Question

de from acetanilide Synthesis of 4-Bromoacetan WORK UNDER THE HOOD In a 10 mL flask fitted with a cork, add 3 mL of acetic acid and 1.6 mL of bromine. Cork the flask tim ready to use Dissolve g of acetanilide (you made this in lab m2) in 15 ml of acetic acid in a 250 MI flask fitted with a stir bar. slowly add a bromine solution while stirring. Rinse the flask with 1 mL of acetic acid and add this rinse to the solution. the mixture for 5 then add mL of distilled water. Add enough 30% sodium bisulfite solution till discharge the reddish color. Cowect the product by suction filtration and wash with 2 small portions of ice-cold water. Dry it and weigh it out. Post lab questions 1. show the detailed mechanism for the reaction 2. Calculate the 96 yield 3. What's the purpose of adding sodium sulfite? 4. In this multistep synthesis, the starting reagent an Propose how to make w2 Bromo from aniline And calculate your overall yield based on experiment and this experiment calculate Yie of LI- Bromo Cotanit from acetanilide 4.0 (79 of a cel ciailrdo. ?sls Prod uuel

Please help me find the % yield and asnwer questions 1,2,3,4

Answer 1

1) 3 Br- CH,COOH Br Br-Br + HBr First we will calculate the theoretical yield as, theroetical yield- gms of reactant*mol.wt of product/mol. wt of reactant, 4.0179*214.05/135.16 -6.36 gms, 2) percent yield- actual yield/theroetical yield*100 7.351/6.36 1.15*100-115 % 3) purpose of adding sodium bisulfite to consume excess brommine by following reaction Br2 + 3 NaSO3H > 2 NaBr + NaHS04 + H2O+2SO2 CH,COOH CH3 Reactant Formula FW Yield CeH,N 93.1285 10.043 mol4gBased on 153.80801 0.043 mol 8.8841 g- Product CH,BrNO 214.05921 0.0343 mol 7.351g 80% С.Н.BrNO | 2140592 | 1 | 0.043 mol | - | 9.1943 g | | 100.1%