過(guò)濾的操作操作要點(diǎn):“一貼二低三靠 .一貼:濾紙緊貼漏斗內(nèi)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(nèi)壁.引流的玻璃棒下端輕靠濾紙三層一側(cè),盛待過(guò)濾的燒杯的尖嘴部靠在玻璃棒的中下部.應(yīng)手持玻璃棒中上部. 查看更多

 

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過(guò)濾操作中的要點(diǎn)常簡(jiǎn)記為“一貼二低三靠”,請(qǐng)你解釋其具體含義:
①“一貼”:________
②“二低”:________,________;
③“三靠”:________,________________.

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過(guò)濾操作的要點(diǎn)可歸納為“一貼、二低、三靠”,具體說(shuō)來(lái)是:“一貼”指 ________,“二低”指 ________,________.“三靠”指 ________,________,________.

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過(guò)濾操作中的要點(diǎn)常簡(jiǎn)記為“一貼二低三靠”,請(qǐng)你解釋其具體含義:
①“一貼”:____________________________________________________________
②“二低”:________________________________________________________       ,
                                                                                                                            
③“三靠”:___________________________                                                          , 
                                                                                                                            
                                                                                                                            。

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

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過(guò)濾操作中的要點(diǎn)常簡(jiǎn)記為“一貼二低三靠”,請(qǐng)你解釋其具體含義:
①“一貼”:____________________________________________________________
②“二低”:________________________________________________________,
____________________________________________________________________;
③“三靠”:_____________      ,____________________,___________。

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