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化学人教版高中必修1第三章第二节《铁的重要化合物》成都市锦江

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视频课题:化学人教版高中必修1第三章第二节《铁的重要化合物》成都市锦江

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化学人教版高中必修1第三章第二节《铁的重要化合物》成都市锦江

第二节   几种重要的金属化合物
3课时  铁的重要化合物
【学习目标】
通过本节课的学习探究,你应该:
1.通过阅读教材、展示图片和讨论交流,了解铁的氧化物的主要性质。
2.通过分组实验、小组讨论,了解Fe(OH)2和Fe(OH)3的制备,通过对比分析,掌握Fe(OH)2和Fe(OH)3的性质。
3.通过实验演示、合作探究,掌握Fe3+的检验,明确Fe2+与Fe3+的相互转化。
【学习重难点】
1. Fe(OH)2的制备的性质需要大家重点关注!
2. Fe2+与Fe3+的相互转化可能是你的一个难点呢!
【学习过程】
活动一阅读教材  了解铁的氧化物5min

活动目标 活动
形式
活动过程
了解铁的氧化物的主要性质  
课前预习
 
阅读教材
 
课内交流
 
师生互评
 
1.阅读教材59页,归纳总结铁的氧化物的相关性质,并完成下表。
  氧化亚铁(FeO) 氧化铁(Fe2O3) 四氧化三铁(Fe3O4)
FeO•Fe2O3
铁的化合价      
色、态      
俗称      
溶解性  
氧化物类别    
稳定性      
用途      
与盐酸反应的离子方程式      
   2.学以致用:
  下列说法错误的是(     )
    A、铁在地壳中的含量仅于氧、硅、铝,居第四位。
    B、Fe3O4可以看成是FeO和Fe2O3 组成的混合物。
    C、铁的氧化物都不溶于水,也不与水反应。
    D、Fe2O3是一种红棕色粉末,俗称铁红。
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
【过渡】既然说FeO和Fe2O3是碱性氧化物,那么它们对应的碱分别是Fe(OH)2和Fe(OH)3。那你知道我们应该如何来制备这两种铁的氧化物吗?
 
 
【活动二】探究铁的氢氧化物(18min
活动
目标
活动
形式
活动过程
了解Fe(OH)2和Fe(OH)3的制备,掌握Fe(OH)2和Fe(OH)3的性质  
 
      
 
 
分组实验
 
 
交流讨论
 
 
 
 
师生互 评
1. Fe(OH)3和 Fe(OH)2的制备。
学生分组完成教材60页实验3-9。认真观察现象并记录。
(1)FeCl3溶液中加NaOH溶液现象___________________________________;
(2)FeSO4溶液中加NaOH溶液现象___________________________________。
2.思维拓展。
想要长时间观察到白色的Fe(OH)2 沉淀,在配制溶液和操作过程中可以分别采取哪些措施?
配制溶液时:_______________________________________________________________;
操作过程中:________________________________________________________________。
3. Fe(OH)3和 Fe(OH)2的性质比较。
小组交流讨论完成下表。
  氢氧化铁  Fe(OH)3 氢氧化亚铁  Fe(OH)2
制备原理
(离子方程式)
   
颜色    
溶解性  
稳定性    
与盐酸反应    
4. 学以致用:
(1)有NaCl、FeCl3、FeCl2、 MgCl2、AlCl3五种溶液,只用一种试剂就可把它们鉴别开来,这种试剂是(     )
   A.盐酸       B.烧碱溶液        C.氨水       D.KSCN溶液
(2)铁屑溶于过量的稀硫酸,过滤后向滤液中加入适量硝酸,再加入过量的氨水,红褐色沉淀生成。过滤,加热沉淀物至质量不再发生变化,得到红棕色的残渣。上述沉淀和残渣分别为(     )        
A.Fe(OH)3;   Fe2O3                                B.Fe(OH)2;   FeO
C.Fe(OH)2、Fe(OH)3; Fe3O4                       D.Fe2O3;  Fe(OH)3
 
 
【活动三】铁盐和亚铁盐(12min
活动
目标
活动
形式
活动过程
掌握Fe3+的检验,明确Fe2+与Fe3+的相互转化
 
 
 
 
 
 
实验探究
 
 
小组讨论交流
 
 
 
教师剖析引导
 
 
 
 
 
师生互评
 
1. Fe2+和Fe3+的检验
  引导学生思考Fe2+和Fe3+不同的鉴别方法,演示教材61页实验3-10。学生认真观察并描述现象。
鉴别方法 Fe2+ Fe3+
     
     
     
 
 
 
 
 

2. Fe3+和Fe2+的转化
师生共同设计Fe3+和Fe2+的转化实验方案,演示教材61页 “科学探究”加以验证,学生观察现象,并填写表格。
  现象 反应的离子方程式
FeCl3溶液滴入KSCN溶液、加入铁粉    
FeSO4溶液滴入KSCN溶液、滴加氯水    

 
 
3. 学以致用:
(1)证明某溶液只含有Fe2而不含有Fe3的实验方法是(      )
A.先滴加氯水,再滴加KSCN溶液后显红色    
B.先滴加KSCN溶液,不显红色,再滴加氯水后显红色
C.滴加NaOH溶液,先产生白色沉淀,后变灰绿,最后呈红褐色
D.只需滴加KSCN溶液
(2)下列物质充分反应后,滴入KSCN溶液,显红色的是(      )
A. FeO+ HCl(溶液)             B. 过量铁+ 稀硫酸
C. FeCl2(溶液) + Cl2            D. Fe + CuSO4(溶液)
 
 
【活动四】课堂小结  巩固强化(5min
活动
目标
活动
形式
活动过程
规律思路方法提炼      
 
 
 
 
巩固强化
 
 
 
 
 
 
 
 
学生
小组
讨论交流
 
学生展示
学生互评
 
教师点拨
 
 
 
 
 
 
 
 
【当堂小结】
这节课我收获了什么?
 
 
巩固强化
1. 联合国卫生组织经过考察和研究,认为我国使用的铁锅是有益于人类健康的理想炊具,并向全世界推广,其主要原因是(  )
A.价格便宜,不易生锈
B.铁锅只含有铁元素
C.烹调的食物中留有人体需要的铁元素
D.传热慢,保温性能好
  2.为了除去FeSO4溶液中Fe2(SO4)3和CuSO4最好选用的试剂是(    )
A.烧碱溶液   B.浓氨水    C.铁粉    D.硫酸
3. 中国工业报报道,国际投行瑞士信贷发布报告称:由于中国对铁矿石的需求增长超过预期,国际矿业巨头明年可能再度提高铁矿石的售价。下列有关铁及其化合物的说法中正确的是(  )
A.赤铁矿的主要成分是Fe3O4
B.铁与水蒸气在高温下的反应产物为Fe2O3和H2
C.除去FeCl2溶液中的FeCl3杂质可以向溶液中加入铁粉,然后过滤
D.Fe3与KSCN反应产生红色沉淀
拓展延伸
1. 利用所学知识、方法,查阅资料设计一个检验“补铁剂”中铁元素化合价的实验方案。
2. 阅读材料,拓展铁的重要化合物在实际生活中的更多应用。
3.试写出完成下列转化的合适试剂及有关的化学反应方程式。
1、______________________________________________
2、­­­­­­­­­­­­­­­­­______________________________________________
3、_______________________________________________
4、_______________________________________________
5、_______________________________________________
6、_______________________________________________
 
 
【疑点反馈】:(通过本课学习、作业后你还有哪些没有搞懂的知识,请记录下来)
                                                                            
 

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