Question

（1）请将下列5种物质：N₂O、FeSO₄、Fe(NO₃)₃、HNO₃和Fe₂(SO₄)₃分别填入下面对应的横线上，组成一个未配平的化学方程式。

                                                                                                                              +                   +            +            + H₂O

（2）反应物中发生氧化反应的物质是                                                                                    ，被还原的元素是                                                                                                                              。

（3）反应中1 mol氧化剂                                                                                               (填“得到”或“失去”)                                                                                                                             mol电子。

（4）请将反应物的化学式及配平后的系数填入下列相应的位置中。

                                                                                                                                  

               +                                                                                                   

                                                                                                                      

 

Answer 1

【答案】

21．（1）              +                   =                   +                   +            + H₂O

N

FeSO4

（2）                     、                        

4

得到

（3）                     、                        

HNO3

FeSO4

24

30

（4）                    +                        

【解析】