①两性                                     方程式:                          

                                                                              

                                                                              

                                                                              

                                                                                                                                                                                                                                                                                                                                                  

②制Al(OH)3的各种方法:

a.由Al3+加碱                        b.AlO2-加酸                             

c. Al3+和AlO2-双水解                                    

d.电解法                                               

③重点记忆:铝的工业制法:                                

            铝热反应:                                   

④铝盐的水解:明矾溶液显碱性,用方程式解释                              

净水原理:                                               

七、铁及其化合物★

(1)铁单质----Fe

①注意产物中化合物的价态

  Fe + S ==             Fe + O2 ==            Fe + Cl2 ==

Fe和稀硫酸反应          离子方程式                                   

  Fe和过量稀硝酸反应      离子方程式                                   

  过量的Fe和稀硝酸反应    离子方程式                                   

 ②铁的腐蚀    在酸性条件下                                               

              铁的吸氧腐蚀                                                

(2)氧化铁----Fe2O3、四氧化三铁-----Fe3O4(写方程式要分清)

  Fe 和 H2O蒸汽高温反应                                 

铝和红色粉末高温反应                                                 

(3)Fe2+、Fe3+的相互转化

FeCl2溶液保存加铁粉      离子方程式                                    

  FeCl3溶解铜片            离子方程式                                   

(4) ①制Fe(OH)3胶体的方法:                                         

             离子方应方程式                                         

②电解法制Fe(OH)2:铁作阳极电解饱和食盐水

反应方程式   阴极                       阳极                    

                 总反应                                      

新制的Fe(OH)2在空气中变质的现象:                                   

      方程式                                   

(5) Fe2+、Fe3+的检验

                                                                           

 

 

 

 

 

 

 

 

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