过滤的操作 操作要点:“一贴二低三靠 .一贴:滤纸紧贴漏斗内壁.二低:滤纸上沿低于漏斗口.液体低于滤纸上沿.三靠:漏斗颈下端紧靠承接滤液的烧杯的内壁.引流的玻璃棒下端轻靠滤纸三层一侧,盛待过滤的烧杯的尖嘴部靠在玻璃棒的中下部.应手持玻璃棒中上部. 查看更多

 

题目列表(包括答案和解析)

过滤操作中的要点常简记为“一贴二低三靠”,请你解释其具体含义:
①“一贴”:________
②“二低”:________,________;
③“三靠”:________,________________.

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过滤操作的要点可归纳为“一贴、二低、三靠”,具体说来是:“一贴”指 ________,“二低”指 ________,________.“三靠”指 ________,________,________.

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过滤操作中的要点常简记为“一贴二低三靠”,请你解释其具体含义:
①“一贴”:____________________________________________________________
②“二低”:________________________________________________________      
                                                                                                                            
③“三靠”:___________________________                                                          , 
                                                                                                                            
                                                                                                                            

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过滤(1)用到的仪器有                                      
(2)操作要点为 一贴即                                           
二低为                                                         
三靠                                                                    
(3)过滤两次以上仍然浑浊可能的原因有:                                     

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过滤操作中的要点常简记为“一贴二低三靠”,请你解释其具体含义:
①“一贴”:____________________________________________________________
②“二低”:________________________________________________________,
____________________________________________________________________;
③“三靠”:_____________      ,____________________,___________。

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