過濾的操作操作要點:“一貼二低三靠 .一貼:濾紙緊貼漏斗內壁.二低:濾紙上沿低于漏斗口.液體低于濾紙上沿.三靠:漏斗頸下端緊靠承接濾液的燒杯的內壁.引流的玻璃棒下端輕靠濾紙三層一側,盛待過濾的燒杯的尖嘴部靠在玻璃棒的中下部.應手持玻璃棒中上部. 查看更多

 

題目列表(包括答案和解析)

過濾操作中的要點常簡記為“一貼二低三靠”,請你解釋其具體含義:
①“一貼”:________
②“二低”:________,________;
③“三靠”:________,________________.

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過濾操作的要點可歸納為“一貼、二低、三靠”,具體說來是:“一貼”指 ________,“二低”指 ________,________.“三靠”指 ________,________,________.

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過濾操作中的要點常簡記為“一貼二低三靠”,請你解釋其具體含義:
①“一貼”:____________________________________________________________
②“二低”:________________________________________________________       ,
                                                                                                                            ;
③“三靠”:___________________________                                                          , 
                                                                                                                            ,
                                                                                                                            。

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過濾(1)用到的儀器有         、           、                   。
(2)操作要點為 一貼即                                           
二低為                     ,                                    
三靠                      ,                      ,                        。
(3)過濾兩次以上仍然渾濁可能的原因有:         ,               ,             

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過濾操作中的要點常簡記為“一貼二低三靠”,請你解釋其具體含義:
①“一貼”:____________________________________________________________
②“二低”:________________________________________________________,
____________________________________________________________________;
③“三靠”:_____________      ,____________________,___________。

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