题干

正丁醚常用作有机反应的溶剂。实验室制备正丁醚的反应和主要实验装置如下:2CH3CH2CH2CH2OH 135C (CH3CH2CH2CH22O+H2O,反应物和产物的相关数据如下表:
①将6mL浓硫酸和37 g正丁醇,按一定顺序添加到A中,并加几粒沸石。
②加热A中反应液,迅速升温至135℃,维持反应一段时间。
③分离提纯:待A中液体冷却后将其缓慢倒入盛有70 mL水的温度分液漏斗中,振摇后静置,分液得粗产物。
④粗产物依次用40 mL水、20 mL NaOH溶液和40 mL水洗涤,分液后加入约3g无水氯化钙颗粒,静置一段时间后弃去氯化钙。
⑤将上述处理过的粗产物进行蒸馏,收集馏分,得纯净正丁醚11g。请回答:
上一题 下一题 0.0难度 选择题 更新时间:2019-06-23 01:22:04

答案(点此获取答案解析)

同类题5

阅读理解

    Lagoon Bar, Iceland

    Blue Lagoon in Iceland is truly the place where you can get rid of all troubles. Here the warmth of hot springs gets you close to nature. A wonderful bar is opened among the hot springs. While you're sitting in the hot water, waitresses bring you a range of cocktails.

    What to order: cocktail “Blue Lagoon” and white wine.

    Baobab Tree Bar Wine Cellar, South Africa

    In the hollow (洞) of a huge 6,000-year-old baobab tree you can not only drink a cocktail, but also rest from the heat of Limpopo Province. Once this safe heaven was known only to the Bushmen, but now this ancient tree is the tourist destination for all kinds of tourists.

    What to order: anything in a glass.

    The Birdsville Hotel and Pub, Australia

    At the edge of the Simpson Desert, among the sand dunes (沙丘), which are the favorite spot for the mice, there is a hotel and a pub. The walls of this bar are decorated with old hats and posters of beer, the oldest of which dates from 1884. Most visitors of this building are the amateurs of racing. They come to this village for the September competition. However, the pub is not empty also on other months: the airstrip (飞机跑道) is located nearby, so those who get off the plane are going to have a glass or two of beer first.

    What to order: a pint of beer.

    Floyd's Pelican Bar, Jamaica

    It appears that these huge palm leaves and trunks fell into the ocean long time ago. They floated on the waves and then piled up year by year, sticking out of the ocean. That's probably how the Pelican Bar, located about a mile from the southwest coast of Jamaica, is built on. Some of its visitors have no room to be fitted inside the bar, and they just drink standing in waist-deep water.

    What to order: cocktail “Pelican Perfection”.