ETHYL BROMIDE FROM VODKA PART TWO

HOW TO MAKE ETHYL BROMIDE FROM VODKA PART TWO ...........I am trying to show stoichiometry and my reasons for not using stoichiometric amounts in this reaction. The actual reaction is on the part one video...............i did try to do an sn2 with aqueous NaOH to take the alkyl halide back to an alcohol but it did NOT work.......i got like a mL of ethanol............any information would be greatly appreciated......also any questions or comments............maybe i can help..............REMEMBER SCIENCE IS GREAT.............................................................the experiment done was just a simulation but when talking about it i prefer to pretend it is all real because these are NOT videos about how to simulate chemical experiments but is about learning about how reactions work and techniques on how to get them to workBROMOETHANE (ethyl bromide) FROM VODKA PART ONE.........I just did this experiment AGAIN one year after this video. I got a better yield of 83%. I used a 2000 mL RBF and added 470mL of 50% by volume vodka (100 proof). Then I dripped in 270 mL sulfuric acid drain cleaner. Both the vodka and drain cleaner were put in the freezer first to cool them down . Nothing was done to clean or distil the sulfuric acid. It was used straight out of the bottle. Then after it was all dripped in...... I let it go to room temp then added 210 grams of sodium bromide. Distilled everything out until the still head was 65 C. Then I washed with NaCO3 to neutralize the acid. Then washed with water to remove the acid and alcohol. Then washed with concentrated aqueous NaCl to remove the water. Then I added a little anhydrous CaCl2 to remove any alcohol and water. Then I distilled that and everything came over between 37 and 38 C. At this point i had 250 mL of dry ethyl bromide. This was a 83% yield. Then I added 3A molecular sieves to store it in a lab freezer