Question

某同学做“证明鸡蛋壳的主要成分是碳酸盐，并收集纯净干燥的气体”的实验。设计了如下方案进行实验：(制得的CO₂中常含有HCl和水蒸气)

   A                B               C             D           E

(21)                                                                                                                                                                                                                                                                 

(22)                                                                                                                                                                                                                                                                写出所标仪器的名称：①             。

(23)                                                                                                                                                                                                                                                                描述A中发生的现象：                                                 。

(24)                                                                                                                                                                                                                                                                根据我们所学的知识，你认为A装置和     装置相连并产生的现象时就足以说明鸡蛋壳的主要成分是碳酸盐，写出所填装置中发生反应的化学方程式_______________。

(25)                                                                                                                                                                                                                                                                该同学想要收集一瓶纯净干燥的该气体，连接上述装置的顺序是：（填写各接口字母）a→                         。其中，写出C装置的作用是：              。

Answer 1

(1) 长颈漏斗                               (2) 有气泡产生蛋壳逐渐溶解

(3) D   Ca(OH)₂+ CO₂ = CaCO₃↓+ H₂O  

(4) a→d→e→b→c→g→(f)（f可有可无）     吸收HCl