Video: Jones test yog dab tsi?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Cov Jones xim xeem Nws yog siv los ntsuas patency ntawm lacrimal kua system. Nyob rau hauv thawj feem ntawm lub xeem , ib tug poob ntawm fluorescein yog muab tso rau hauv lub conjunctival cul-de-sac. Yog tias tsis muaj fluorescein raug sau tseg, cov dye yog obstructed nyob rau sab sauv (canalicular) feem ntawm lub cev.
Kuj paub, Jones reagent xeem rau dab tsi?
Jones reagent yog ib qho kev daws ntawm chromium trioxide hauv aqueous sulfuric acid. Siv acetone ua cov tshuaj tiv thaiv hnyav, cov reagent feem ntau yog siv rau cov oxidation ntawm thawj thiab theem nrab cawv rau carboxylic acids thiab ketones, feem.
Ib tug kuj yuav nug, qhov kev kuaj zoo rau kev kuaj chromic acid txhais li cas? Cov Chromic Acid Test . Qhia kuaj qhov zoo rau:1o thiab 2o cawv thiab aldehydes. Cov tshuaj tiv thaiv: aldehydes thiab thawj cawv yog oxidized rau carboxylic kua qaub thaum Cr+6 ion hauv chromic acid raug txo kom Cr+3. Secondary cawv yog oxidized rau ketones thaum lub Cr+6 ion hauv chromic acid raug txo kom Cr+3.
Yog li ntawd, qhov kev xeem rau cawv yog dab tsi?
Lub Lucas xeem hauv cawv yog a xeem kom sib txawv ntawm cov thawj, theem nrab, thiab tertiary cawv . Nws yog raws li qhov sib txawv ntawm reactivity ntawm peb chav kawm ntawm cawv nrog hydrogen halides ntawm SN1 cov tshuaj tiv thaiv: ROH + HCl → RCl + H2O.
Yuav ua li cas koj ua ib tug Jones reagent?
Jones reagent muaj chromium trioxide thiab sulfuric acid yaj nyob rau hauv ib tug sib tov ntawm acetone thiab dej. Raws li lwm txoj hauv kev, potassium dichromate tuaj yeem siv rau qhov chaw ntawm chromium trioxide. Cov oxidation yog ceev heev, heev exothermic, thiab yields feem ntau siab.
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