问题 填空题

(10分)欲制无水氯化铝并保存备用。现有仪器如下图所示,并有浓盐酸、水、固体烧碱、铝粉、二氧化锰、浓硫酸、碱石灰(主要成分为CaO, NaOH)、食盐固体等八种试剂。

设计的制取过程是:制氯气 → 净化和干燥氯气 → 制氯化铝

查资料得知:无水AlCl3极易与水作用而变质:AlCl3易升华

 

请回答下列问题:

(1)从上列仪器中选取必须的几种,连接成一个制无水氯化铝的连续装置,按前后顺序填写图的编号(可以重复使用)。

仪器编号                                

(2)写出实验过程中有关反应的化学方程式(任意2个)。

                                                  

                                                  

(3)以上连接装置中最后连接④的作用是                                          

                                                                              

答案

(10分)

(1)仪器编号                  (共2分)

 
(2)化学方程式(任意2个)。(各2分)

 
 MnO2 + 4HCl ="=" MnCl2 + Cl2↑ + 2H2O                  

  2Al + 3Cl2 = 2AlCl3        Cl2 + 2NaOH ="=" NaCl + NaClO + H2O       

(3)④的作用是 吸收过量的Cl2防止空气中的水蒸气进入试管中使AlCl3变质

(共4分)

阅读理解

根据短文内容,完成下列句子,每空一词。

     When Abe Lincoln was just a boy, he had to help his father Tom to look after their farm. It was hard work

and there wasn't much fun for him. Abe Lincoln wanted to go to school, but there was no school there. Abe was

sad most of the time. 

     Mrs Lincoln loved the boy very much. She tried her best to make Abe happy. One morning she got up early

and said to Tom Lincoln, "I'm going to town. "Tom was surprised. "That's a long way. And the snow is heavy.

What are you going to do in the town?"

     "I'll let you know when I come back," She said and then went out of the house. It took Mrs Lincoln a long

time to get to town. She bought something there and started back. And it was late in the evening when she got

home. 

     The next morning Mrs Lincoln said to Abe, "Today is your birthday. We are going to have a party!" She put

some food on the table,then brought out a present. 

     "A book!" Abe cried. It was an old book, but he liked it. A smile came to his face. He looked up at Mrs

Lincoln and said, "Thank you!" 

1. When he was a child, Abe Lincoln wanted to be a school _____, but there weren't any schools nearby. So he

    ______ go to school.

2. Mrs Lincoln loved her ______ and tried her best to make him happy. One morning, she wanted to go out to

    do some ______.

3. It took Mrs Lincoln a lot of ______ to ______ town.

4. Mrs Lincoln ______ Abe a present. The present for Abe was a ______.

5. Abe was very ______ to have the present. He ______ it very much.

单项选择题 A1型题