Question

（1）請將下列5種物質(zhì)：N₂O、FeSO₄、Fe(NO₃)₃、HNO₃和Fe₂(SO₄)₃分別填入下面對應(yīng)的橫線上，組成一個未配平的化學(xué)方程式。

                                                                                                                              +                   +            +            + H₂O

（2）反應(yīng)物中發(fā)生氧化反應(yīng)的物質(zhì)是                                                                                    ，被還原的元素是                                                                                                                              。

（3）反應(yīng)中1 mol氧化劑                                                                                               (填“得到”或“失去”)                                                                                                                             mol電子。

（4）請將反應(yīng)物的化學(xué)式及配平后的系數(shù)填入下列相應(yīng)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】