27、（1）                                                  、           

（2）                    、                    、

     工作原理是：                                                             

（3）后续实验步骤是                                                          

（4）离子方程式：                                                          、

     理由：                                                                  

（5）                                                                         

高二化学期中考试答案

题号

1

2

3

4

5

6

7

8

9

10

11

答案

C

D

C

A

D

C

C

D

B

D

D

题号

12

13

14

15

16

17

18

19

20

21

答案

D

C

C

B

C

B

C

A

B

D