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2026初中化学中考教材实验整合(一)

  • 2026-05-15 21:13:26
2026初中化学中考教材实验整合(一)
不同实验中的同种仪器——玻璃棒
实验装置

玻璃棒的作用

用于引流的是①;用于搅拌的是②③④;用于蘸取液体的是⑤

不同实验中的同种物质——红磷
实验装置

 红磷的作用:

图1:燃烧,消耗氧气,产生压强差

图2:作对照(验证燃烧需要达到可燃物的着火点)。

图3:反应物,参与化学反应。

练习题:

(1)图1实验中,用燃磷法测定空气中氧气的含量,红磷要足量的目的是红磷熄火后冷却至室温,集气瓶内液面位于刻度(填数字)处;该实验中能否用铁丝代替红磷,并说明理由

   (2)图2实验中,白磷和红磷的用量及形状等需一致,对比铜片上的白磷和红磷,说明可燃物燃烧需要

   (3)图3是验证质量守恒定律的实验。锥形瓶内发生反应的化学方程式

为。实验结束后,观察到天平保持平衡。参加反应的红磷的质量(填“>”“<”或“=”)生成物的质量。若使用的红磷不足,(“能”或“不能”)验证质量守恒。

答案:(1)尽可能将氧气完全消耗     1    不能,铁丝在空气中不能燃烧             

          (2)温度达到可燃物的着火点

           (3)化学方程式(略)     <    能

不同实验中的同种物质——水
实验装置
水的作用
(1)图1是仪器的连接,其中水的作用是

(2)图2是试管的洗涤,洗净的标准是试管内壁附着的水

(3)图3是浓硫酸的稀释,其中水作(填“溶剂”或“溶质”)。

(4)图4是空气中氧气含量测定的实验,集气瓶中的水有两个作用,分别是降温和

(5)图5是铁丝燃烧实验,其中水的作用是,水还可以用替代。

(6)图6是硫燃烧实验,其中水的作用是。可以用细沙代替水吗?

(7)图7是排水法收集气体,集气瓶中装满水的作用是 ,能用此方法收集的气体具有的性质是

(8)图8是探究二氧化碳能否与水反应的实验(将三朵干燥的石蕊纸花按操作),中水的作用是

(9)图9是铁锈蚀条件的探究实验,其中蒸馏水需经过煮沸且迅速冷却的目的是

(10)图10是电解水实验,其中水的作用是

(11)图11是燃烧条件的探究实验,其中热水的作用有两个,分别是

(12)图12是验证装置的气密性,其中水的作用是

(13)图13是稀释浓硫酸,其中水的作用是。要注意是将沿着烧杯壁慢慢注入中。

(14)图14是加热液体,其中水的作用是。此变化属于物理变化。

(15)图15是生石灰与水反应,其中水的作用是。此反应是(“放热”“吸热”)反应。

(16)图16是自制净水器,其中水的作用是                      。活性炭的作用是

(17)图17是配制一定质量分数的溶液,其中水的作用是。玻璃棒搅拌的目的是

答案: 

(1)作润滑剂

(2)既不聚成水滴,也不成股流下

  (3)溶剂

(4)吸收反应生成的五氧化二磷,防止污染空气

(5)防止生成的高温熔融物溅落,炸裂集气瓶瓶底       细沙

(6)吸收反应生成的二氧化硫,防止其污染空气     不可以

  (7)排尽集气瓶内的空气,便于观察气体是否收集满        难(或不易)溶于水且不与水反应

 (8)作对照

 (9)除去水中溶解的氧气

 (10)作反应物

(11)提供热量   隔绝空气

(12)形成密闭体系,检验装置气密性
(13)稀释浓硫酸,吸收热量    浓硫酸     水
(14)作为被加热的物质    物理
(15)作为反应物,验证反应放热       放热
(16)作为被净化的对象    吸附色素及异味
(17)作为溶剂溶解溶质    搅拌,加速溶解

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昨天,一起反思

今天,共同努力

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  1. CONNECT:[ UseTime:0.000368s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000660s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000266s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000272s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000492s ]
  6. SELECT * FROM `set` [ RunTime:0.000194s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000588s ]
  8. SELECT * FROM `article` WHERE `id` = 468156 LIMIT 1 [ RunTime:0.000418s ]
  9. UPDATE `article` SET `lasttime` = 1778887275 WHERE `id` = 468156 [ RunTime:0.003470s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000265s ]
  11. SELECT * FROM `article` WHERE `id` < 468156 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000454s ]
  12. SELECT * FROM `article` WHERE `id` > 468156 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000378s ]
  13. SELECT * FROM `article` WHERE `id` < 468156 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001247s ]
  14. SELECT * FROM `article` WHERE `id` < 468156 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002906s ]
  15. SELECT * FROM `article` WHERE `id` < 468156 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000752s ]
0.084701s