题目

化学家侯德榜创立了中国的制碱工艺,促进了世界制碱技术的发展。下图是纯碱工艺的简化流 (1) 写出CO2的电子式。 (2) 用离子方程式表示纯碱工艺中HCO3-的生成。 (3) 工业生产时先氨化再通CO2 , 顺序不能颠倒,原因是。 (4) 滤液A中最主要的两种离子是。 (5) 某小组设计如下实验分离滤液A中的主要物质。打开分液漏斗活塞,一段时间后,试管中有白色晶体生成,用化学原理解释白色晶体产生的原因。 阅读填空(共1小题)阅读下面材料,在空白处填入适当的内容(不多于3个词)或括号内单词的正确形式。I'm Jan Hasek, 1._____ old miner from the Czech Republic.In April 1945 I 2.______ (hear) something explode at midnight.I got up and 3._______ (run) outside.The sound came from a mine 4._____hadn't been used for a long time.Suddenly I saw some German soldiers 5._____the light of the moon.They were taking wooden boxes from trucks and putting 6.______in the mine.A week later I decided 7._____ (go) and see for myself.To my surprise the entrance 8._____ the mine was closed.Some people say that the Amber Room and some gold 9.___________ (bury) in the mine.I think it might be so, 10._________ the Amber Room has never been found.
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