Principle: E thyl iodide synthesis is usually reacted with ethanol, iodine and red phosphorus, but the reaction is slow, and it needs to be heated in a reflux device for several hours. Supplies: Flask, straight condenser, beaker, red phosphorus, alcohol, iodine crystals, zeolite, 5% NaOH solution, anhydrous calcium chloride. Operation: 2 g of red phosphorus and 25 ml of alcohol were added to a 125 ml flask, and 18 g of finely divided iodine crystals were added in portions under shaking, followed by the addition of 3 zeolites. A straight condenser was placed on the flask and allowed to reflux for half an hour by heating in a water bath. After the reaction is completed, the mixture is cooled, and the reflux straight condenser is discharged, and then the condenser is replaced with a common distillation apparatus. It should be noted that the receiver should be filled in a cold water bath to prevent the produced iodoethane from being volatilized. The iodoethane was...