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淮南市2016年中考化学实验操作试题(3)

来源:物理ok网 编辑:张宏 时间:2017-03-07 点击量:
考生请检查桌面所需实验用品,如发现实验用品有损失或缺少可向监考老师提出,但不得提出其他问题。考生必须独立操作,不能相互讨论,请保持考场肃静。
 
实验用品:石灰石、稀盐酸、石灰水、集气瓶(配毛玻璃片)、锥形瓶、单孔橡皮塞(配带玻璃管、橡皮管)、烧杯、试管、镊子、火柴、试管刷、废液缸、金属架、小蜡烛(固定在金属架上)、水、试管架
 
主要实验步骤:
1.组装仪器
2.检查装置气密性
3.用滴管向试管中滴入约2mL澄清石灰水(备用)
4.制取CO2
5.将CO2气体通入盛有澄清石灰水的试管中,现象                        。
6.收集一瓶CO2并验满
7.点燃金属架上的小蜡烛;将金属架放入烧杯中。拿起收集满二氧化碳的集气瓶,向烧杯内倾倒二氧化碳。观察到的现象是:                                 。
 
清洗仪器,整理台面
 
 
 
 
实验二《二氧化碳的实验室制取与性质》评分细则
 
考生姓名                  准考证号                
 
序号 考核点 评分细则 分值 得分
1 检查气密性(2分) 连接仪器 1  
先将导管口伸入水中,双手紧握锥形瓶外壁,观察现象 1  
  2 滴管的
使用(2分)
不能平放或倒置,滴加后立刻放回原滴瓶 1  
不能插入试管中,应竖直于试管口上方滴加                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1  
  3
 
块状固
体取用
(2分)
用镊子夹取,镊子使用前、后要擦拭干净 1  
锥形瓶横放,药品放于瓶口,慢慢滑落下去 1  
  4 倾倒液体
(4分)
瓶盖倒放 1  
标签对手心,试剂瓶口紧挨容器口 1  
倒完液体,立刻盖紧瓶塞,试剂瓶放回原处 1  
先放固体,再加液体,液体药品用量不能过多 1  
5 收集与验满(2分) 用向上排空气法收集,导管插到接近瓶底部 1  
燃着的木条放于集气瓶口检验,盖上毛玻璃片,正放于桌面 1  
6 熄灭蜡烛
(1分)
点燃金属架上的蜡烛,放在烧杯里,正确的往烧杯里倾倒二氧化碳 1  
7 填写实验
报告(1分)
依据实验现象如实填写 1  
8 实验习惯
(1分)
实验结束后正确处理废弃物,清洗仪器,仪器药品归位,整理台面 1  
       
 

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