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初中化学《溶解度曲线》教资面试试讲逐字稿真题模板结构化

  • 2026-03-14 15:00:05
初中化学《溶解度曲线》教资面试试讲逐字稿真题模板结构化

溶解度曲线》试讲逐字稿

面试真题解析

开场白尊敬的各位评委老师,大家好!我是初中化学教资面试的考生。今天试讲课题是《溶解度曲线》。下面开始我的试讲。


(一)新课导入:上课!同学们好~请坐!:俗话说“温故而知新”,咱们先来热热身!谁能帮大家回忆:固体溶解度到底咋定义?靠窗这位帅哥,来说!

生1:在一定温度下,某固体溶解在100g溶剂里,达到饱和时溶解的质量!

:字正腔圆!掌声!从定义里,你们猜——溶解度大小跟啥“挂钩”?(生七嘴八舌:温度!压强!溶剂种类!)

:脑洞全开!今天咱们就来“实战”——探究影响溶解度的条件,顺便解锁新武器:溶解度曲线!(板书课题)


(二)新课教学1. 实验探究 + 表格记录(指实验台):看!硝酸钾、烧杯、天平、量筒……全副武装!任务:4人一组,测不同温度下硝酸钾的溶解度,数据记表格!注意:搅拌均匀!温度计别碰杯底!有疑问举手~(巡视:蹲下看“60℃加了多少克?”、帮调天平、夸“表格写得像印刷体!”)(投影数据):时间到!全班数据上大屏!第二排这位小姐姐,来说说你发现了啥?生2:温度越高,硝酸钾溶得越多!:火眼金睛!但表格数字一堆,趋势看不清——咋办?

2. 绘制溶解度曲线:这边男生,支个招!生3:画溶解度曲线:预习小能手!操作

  • 横轴 →温度(°C)
  • 纵轴 →溶解度(庚)
  • 找点 → 连成光滑曲线

发方格纸,5分钟开画!(巡视:帮找点、提醒“曲线别折成锯齿”):停笔!谁来投屏PK?(投影一组作品):哇!曲线丝滑得像奶茶吸管!大家对照自查~3. 观察分析 + 总结意义(投影三条曲线:硝酸钾、氯化钠、氢氧化钙):三条曲线同台!小组讨论:能“读”出啥化学情报?(2分钟讨论)(板书+逐条讲):

  1. 每个点→ 某温度下该物质的溶解度
  2. 曲线走势→ 温度影响趋势
    • 硝酸钾:陡升→ 越热越能溶(提纯神器!)
    • 氢氧化钙:下降→ 越热越“挑食”
    • 氯化钠:几乎平→ 温度无感(坡度越大,温度影响越大!)
  3. 横向比→ 同温度下谁更能溶
  4. 交点→ 两物质溶解度“打平”

(三)巩固小结:光说不练假把式!来,化学“练兵场”!(投影硝酸钾曲线,标a、b点)

  • (曲线):?
  • b点(曲线):?

(齐喊):a饱和!b不饱和!:秒答!收获晒晒:后排这位,来说!生4:会画曲线!还能“读”出温度影响、比较大小……:满分!


(四)布置作业:回家画一张溶解度曲线思维导图

  • 怎么画?
  • 能读啥?
  • 生活例子?(如热牛奶冲巧克力)

拍照发群,下节课PK!:下课!同学们再见~

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  133. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/framework/src/think/Cookie.php ( 6.06 KB )
  134. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/think-view/src/Think.php ( 8.38 KB )
  135. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/framework/src/think/contract/TemplateHandlerInterface.php ( 1.60 KB )
  136. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/think-template/src/Template.php ( 46.61 KB )
  137. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/think-template/src/template/driver/File.php ( 2.41 KB )
  138. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /yingpanguazai/ssd/ssd1/www/no.15386.cn/runtime/temp/97c957f747c268aee476c4e16775dd7c.php ( 12.06 KB )
  140. /yingpanguazai/ssd/ssd1/www/no.15386.cn/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000551s ] mysql:host=127.0.0.1;port=3306;dbname=no_15386;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000780s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000323s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000270s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000480s ]
  6. SELECT * FROM `set` [ RunTime:0.000182s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000564s ]
  8. SELECT * FROM `article` WHERE `id` = 462608 LIMIT 1 [ RunTime:0.009418s ]
  9. UPDATE `article` SET `lasttime` = 1773523869 WHERE `id` = 462608 [ RunTime:0.011658s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.005218s ]
  11. SELECT * FROM `article` WHERE `id` < 462608 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000503s ]
  12. SELECT * FROM `article` WHERE `id` > 462608 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.002284s ]
  13. SELECT * FROM `article` WHERE `id` < 462608 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001669s ]
  14. SELECT * FROM `article` WHERE `id` < 462608 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.013208s ]
  15. SELECT * FROM `article` WHERE `id` < 462608 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.005322s ]
0.118241s