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qiao yong zhu she qi shi shi zhong xue hua xue shi yan
Author(s): 
Pages: 24-25
Year: Issue:  3
Journal: Experiment and Equipment for Primary School

Abstract:  注射器能经受一般化学试剂的腐蚀,其针筒可视为一个封闭的反应器,能通过溶置口抽入液体反应物,能抽出推杆后投入固体反应物,能收集、贮存和运送气体.经过密封后推动推杆能给气体体系加压,针管可点燃气体.适合于不加热时发生的化学反应的实验.巧妙地开发这些特点,能更长时间反复地观察实验现象,有效消除气体污染,减少实验教学时间,增强实验教学效果.
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