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品配位之妙,探化学之趣 —— 郑州一中田琳琳老师配位键示范课

  • 2026-03-31 07:00:03
品配位之妙,探化学之趣 —— 郑州一中田琳琳老师配位键示范课

品配位之妙,探化学之趣 

—— 郑州一中田琳琳老师配位键示范课

       在高中化学的知识体系中,配位键与配位化合物是选择性必修阶段的重点与难点,既涉及微观的化学键成键原理,又关联着生活中的化学应用,对学生的逻辑思维与知识迁移能力要求颇高。田琳琳老师以鲁科版选择性必修一第二章复习课为蓝本,带来了一堂题为《配位键与配位化合物》的精彩公开课,将抽象的化学概念与生活实际深度融合,以精巧的课堂设计、灵动的教学互动,为听课教师呈现了一堂兼具深度、温度与趣味的高中化学示范课,尽显骨干教师的教学功底与教学智慧。

1

亮点一:生活设问破题,激发探究兴趣

      课堂开篇,田老师以一个贴近生活的问题 ——“食盐中为何加入 K₄[Fe(CN)₆]?安全吗?” 直击核心,瞬间抓住学生的注意力。结合精制食用盐的配料表、剧毒氰化钾与安全亚铁氰化钾的性质对比,制造出 “氰根离子剧毒,为何亚铁氰化钾却能作为食盐抗结剂” 的认知矛盾,让学生带着疑问走进课堂。同时,针对网络上 “食盐里加亚铁氰化钾危害生命” 的谣言,引导学生从化学本质出发寻找答案,既贴合生活实际,又培养了学生辨别科学谣言的能力,让学生感受到化学知识的实用价值,为后续配位键概念的讲解做好了充分的情境铺垫。

2

亮点二:概念解构层层递进,突破教学重难点

      配位键的形成、配离子的结构、配位数与化合价的判断,是本节课的核心重难点。田老师摒弃了“概念灌输 + 例题讲解”的传统模式,采用“拆解概念 — 任务驱动 — 层层递进”的教学思路,让学生在自主探究中掌握知识。在配位键概念讲解中,先明确配位键是“一方提供孤电子对,另一方提供空轨道”的特殊共价键,以 NH₄⁺、B(OH)₄⁻为简单实例,帮助学生建立基础认知;随后设计“任务一:识别配位键”,让学生分析 Al₂Cl₆、NH₃BH₃、钴酞菁等复杂物质的结构式并标记配位键,从简单到复杂,逐步强化学生对配位键成键特点的理解。在配位数、化合价判断环节,设计“任务二:判断化合价”“任务三:准确判断配位数”,结合 Zn、Co、Fe、Ni 等金属的配合物实例,让学生在分析中总结规律,同时引入 EDTA、乙二胺等多齿配体,区分 “配位键个数”与“配位数”的易混点,通过精准的问题设计,突破了教学中的核心难点,让抽象的微观概念变得可感知、可分析。

3

亮点三:平衡视角深挖本质,培养化学核心素养

本节课作为复习课,并非简单的知识重复,而是站在化学平衡的高度,深挖配合物的稳定性本质,实现了知识的升华。田老师设计 “任务三:化学平衡与配合物的稳定性”,结合 FeCl₃溶液显色、CuCl₂溶液颜色变化等实验探究,让学生从平衡移动角度解释现象:如 FeCl₃溶液显黄色是因为 Fe(H₂O)₆³⁺水解形成 Fe(OH)(H₂O)₅²⁺,加入 KSCN 溶液变红是因为形成了更稳定的 Fe(SCN)₃;通过定量计算配合物的稳定常数 K,让学生理解 CN⁻与 Fe³⁺的结合能力远强于 SCN⁻的本质原因。整个过程中,田老师引导学生运用 “宏观辨识与微观探析”“变化观念与平衡思想” 等化学核心素养分析问题,让学生不仅掌握 “是什么”,更理解 “为什么”,培养了学生的逻辑推理与定量计算能力,体现了高中化学复习课的深度与思维性。

○ ○ ○

教研评课

           课后,全体化学老师开展了深入的评课交流。会议由化学教研组长刘善超老师主持。 刘善超老师总结整堂公开课,田老师以学生为主体,以问题为导向,以生活为载体,将知识讲解、能力培养、素养落地完美融合,其娴熟且科学的教学方法更是让课堂效果事半功倍,是一堂兼具示范意义与引领作用的高品质高中化学复习课,值得各位教师学习与借鉴。

       高三史丽斐老师评价本节课是一节高质量的高三复习示范课,教学设计精巧、重点突出,紧扣高考考向,复习实效显著。课堂以生活实例引入,将抽象的配位键、配合物知识与实际应用相结合,降低理解难度。教学由易到难、层层递进,系统梳理核心知识,精准拆解考点与命题原理。课堂紧扣高考真题,讲练结合,针对性强;板书清晰、语言简练,节奏紧凑高效,充分体现思维导学理念,学生思维活跃。建议后续强化定性与定量结合训练,适当增加巩固练习,优化课堂小结,进一步提升知识落实效果。总体而言,本课知识容量大、备考导向明确、示范作用强,为高三一轮复习课提供了很好的借鉴。

高二王艳波老师评价本节课思路新颖、导课设计精巧。讲课难度由易到深,紧扣高考常考、易失分点。如果最后的练习题不讲,改成课堂小结整堂课会更完整。

       教务处师蕊瑾主任建议,因本节课课堂容量大,课件可提供给学生课后回顾。亮点是难点与高考考点拆解清晰,板书设计重点突出,课堂连贯紧凑,语言简练无多余表述,是一节优质示范课。

       张京涛校长提出作为骨干教师示范课,课堂容量充足,如果能做到课上精讲、课下辅导,教学会更扎实高效。、

        余晓阳校长高度肯定了这堂公开课,备课充分,课堂容量大,希望青年教师能从中有所收获,有所成长。

配位键与配位化合物公开课PPT.pdf

示范引领,携手同行在探索中前行,在反思中成长让我们携手共进书写教育新篇章

END

编辑:余璐璐

供稿:田琳琳

审核:刘善超

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  1. CONNECT:[ UseTime:0.000419s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000621s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000337s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000288s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000688s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000547s ]
  8. SELECT * FROM `article` WHERE `id` = 499564 LIMIT 1 [ RunTime:0.000481s ]
  9. UPDATE `article` SET `lasttime` = 1775416841 WHERE `id` = 499564 [ RunTime:0.005647s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000250s ]
  11. SELECT * FROM `article` WHERE `id` < 499564 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000435s ]
  12. SELECT * FROM `article` WHERE `id` > 499564 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000421s ]
  13. SELECT * FROM `article` WHERE `id` < 499564 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.002692s ]
  14. SELECT * FROM `article` WHERE `id` < 499564 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002673s ]
  15. SELECT * FROM `article` WHERE `id` < 499564 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.002474s ]
0.084904s